Category: Class 6

Students can download 6th Science Term 3 Chapter 1 Magnetism Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 3 Chapter 1 Magnetism

Samacheer Kalvi 6th Science Magnetism Text Book Back Questions and Answers

1. Choose the correct answer:

Question 1.
An object that is attracted by a magnet.
a. wooden piece
b. plain pins
c. eraser
d. a piece of paper
Answer:
b. Plain pins

Question 2.
People who made mariner’s compass for the first time.
(a) Indians
(b) Europeans
(c) Chinese
(d) Egyptians
Answer:
(c) Chinese

Question 3.
A freely suspended magnet always comes to rest in the direction
a. North-east
b. South-west
c. East-west
d. North-south
Answer:
d. North-South

Question 4.
Magnets lose their properties when they are
(a) used
(b) stored
(c) hit with a hammer
(d) cleaned
Answer:
(c) hit with a hammer

Question 5.
Mariner’s compass is used to find the
a. speed
b. displacement
c. direction
d. motion.
Answer:
c. direction

II. Fill in the Blanks

1. Artificial magnets are made in different shapes such as ……….., ………… and ………..
2. The Materials which are attracted towards the magnet are called ………..
3. Paper is not a ……….. material.
4. In olden days, sailors used to find direction by suspending a piece of ………..
5. A magnet always has ………. poles.

Answer:

1. Oval shape, Disc Shape, cylindrical shape
2. magnetic materials
3. magnetic
4. lodestone
5. Two

III. True or False. If False, give the correct answer.

1. A cylindrical magnet has only one pole.
2. Similar poles of a magnet repel each other.
3. Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
4. A compass can be used to find East-West direction at any place.
5. Rubber is a magnetic material.

Answer:

1. False – A cylindrical magnet has two poles.
2. True
3. False – Maximum iron fillings stick in the poles of a bar magnet when it is brought near them.
4. False – A. compass can be used to find north-south direction at any place.
5. False – Rubber is a non-magnetic material.

IV. Match the following

Answer:
1. – d
2. – c
3. – b
4. – a

V. Circle the odd ones and give reasons

Question 1.
Iron, nail, pins, rubber tube, needle
Answer:
Iron, nail, pins,  needle
Rubber tube is a non-magnetic substance.

Question 2.
Lift, escalator, electromagnetic train, electric bulb
Answer:
Lift, escalator, electromagnetic train,
Electromagnet is not used in an electric bulb.

Question 3.
Attraction, repulsion, pointing direction, illumination
Answer:
Attraction, repulsion, pointing direction,
Illumination is not a magnetic property.

VI. The following diagrams show two magnets near one another. Use the words, ‘Attract, Repel,Turn around’ to describe what happens in each case:

Answer:
(a) Attract. Opposite poles S – N attracts each other.
(b) Repel. Like poles S – S repel each other.
(c) Attract. Opposite poles N – S attract each other.
(d) Turn around.
(e) Repel. Like poles N – N repel each other.
(f) Turn around.

VII. Write down the names of substances.

Answer:

VIII. Give Short Answer

Question 1.
Explain the attraction and repulsion between magnetic poles.
Answer:

1. Like poles (N – N, S – S) repel each other.
2. Unlike poles (N – S, S – N) attract each other.

Question 2.
A student who checked some magnets in the school laboratory found out that their magnetic force is worn out. Give three reasons for that?
Answer:
Magnets lose their properties if they are heated or dropped from a height or hit with a hammer.

IX. Answer in detail

Question 1.
You are provided with an iron needle. How will you magnetize it?
Answer:

1. Place the iron needle on the table.
2. Take a bar magnet and place one of its poles near one edge of the iron needle.
3. Rub from one end to another without changing the direction of the pole of the magnet.
4. Repeat the process 30 to 40 times. The needle will be magnetized.
5. If it will not attract pin or iron fillings continue the same process for some more time.

Question 2.
How does electromagnetic train work?
Answer:

1. Electromagnets are used in electromagnetic trains.
2. Electromagnets are magnetised when current flows through them. When the direction of the current is changed, poles will be changed.
3. Magnets are attached at the bottom of the train and rail tracks.
4. The train is lifted from track up to 10 cm height by the property of the same poles repel each other.
5. By using attraction and repulsion at the same time between the magnets in tracks and bottom of train move forward.
6. The magnets are controlled by electricity.
7. There is no friction. So the train can easily attain a speed of 300 km/ h.

X. Questions based on Higher Order Thinking Skills

Question 1.
You are provided with iron filings and a bar magnet without labelling the poles of the magnet. Using this ……….

a. How will you identify the poles of the magnet?
Answer:

1. When we place the bar magnet in iron fillings a large number of iron fillings stick on the two ends of the bar magnet. These ends are poles of the magnet.
2. Poles will attract more iron filings. Because poles have high magnetic strength.

b. Which part of the bar magnet attracts more iron filings? Why?
Answer:
The more iron filings are attracted by the poles of the magnet because the poles have more concentrated magnetic power.

Question 2.
Two bar magnets are given in figure A and B. By the property of attraction, identify the North pole and the South pole in the bar magnet (B)

Answer:
Opposite poles attract each other. The second pole of magnet A is N (north pole). So magnet B has S – N poles. Then only they will attract.

Question 3.
Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into the water?
Answer:

1. Take a bar magnet.
2. Tie it in a thread.
3. Dip the tied magnet into the glass of water.
4. The pins are attracted by the magnet.
5. Now take out the magnet from the glass of water.
6. Collect the pins from the magnet.

Samacheer Kalvi 6th Science Magnetism Additional Important Questions and Answers

I. Choose the right answer:

Question 1.
Which is not attracted by a magnet?
(a) Iron
(b) Cobolt
(c) Nickel
(d) Rubber
Answer:
(d) Rubber

Question 2.
Among the following which one is a magnetic substance?
(a) Nickel
(b) Sodium
(c) Oxygen
(d) Potassium
Answer:
(a) Nickel

Question 3.
Who invented leading stone?
(a) Indians
(b) Europians
(c) Chinese
(d) Americans
Answer:
(c) Chinese

Question 4.
Magnets lose their properties if they are _______
(a) dipped in water
(b) dipped in oil
(c) heated
(d) in freezer
Answer:
(c) heated

Question 5.
The maximum speed of electromagnetic train is
(a) 380 km/hr
(b) 600 km/h
(c) 480 km/h
(d) 690 km/h
Answer:
(b) 600 km/h

II. Fill in the blanks:

1. Magnets are used to find directions. So they are called as ………..
2. ……….. is the ore with attracting property.
3. Ever silver spoon is a ……….. material.
4. ……….. is used to seperate iron from wastages.
5. The attractive force of magnet is high near …………

Answer:

1. leading stem
2. Magnetite
3. non-magnetic
4. electromagnet
5. Poles

III. Match the Following:

Answer:
1. – v.
2. – iii.
3. – i.
4. – ii.
5. – iv.

IV. Very Short Answer Questions:

Question 1.
What are artificial magnets?
Answer:
Man-made magnets are called artificial magnets.
(Eg.) bar-magnets, horseshoe magnets.

Question 2.
What are the different types of artificial magnets?
Answer:

1. Bar-magnet, Horseshoe magnet, Ring magnet and Needle magnet are generally used artificial magnets.
2. Oval-shape, Disc shape and cylindrical shape magnets are also available.

Question 3.
What are magnetic substances?
Answer:
Substances which are attracted by magnets are called magnetic substances. (Eg.) Iron, Cobolt, Nickel

Question 4.
What are non-magnetic substances?
Answer:
Substances which are not attracted by magnets are called non-magnetic substances. (Eg.) Paper, Plastic etc.

Question 5.
What are the uses of magnets?
Answer:

1. We use various equipment with magnets in day to day life.
2. We use magnets in speakers, small electric motors, some door locks, bags, some toys, compass, pencil boxes, phone covers, pin holders and magnetic crane.

V. Long Answer Questions:

Question 1.
What are the storage methods of magnets?
Answer:

1. Improper storage can also cause magnets to lose their properties.
2. To keep them safe, bar magnets should be kept in pairs with their unlike poles on the same side.
3. They must be seperated by a piece of wood and two pieces of soft iron should be placed across their ends.
4. For a horse shoe magnet a single piece of soft iron can be used as a magnetic keeper across the poles.

Question 2.
How to find directions with a magnet?
Answer:

1. Tie a piece of thread to the centre of a bar magnet and suspend it freely.
2. Note the direction in which the magnet stops.
3. Draw a line on a cardboard sheet along the direction in which the bar magnet stops, (ie., a line parallel to the bar magnet)
4. Turn the magnet gently and let it come to stop again.
5. Repeat it three or four times. The magnet always comes to rest in north-south direction.

VI. Questions based on higher-order thinking skills:

Question 1.
When iron needle is rubbed with bar magnet the needle get magnetized. But rubber piece is rubbed with magnet it will not get magnetized. Why?
Answer:
Because rubber is a non-magnetic substance.

Question 2.
What will happen when we place magnets near cell phone, computer and DVD?
Answer:

1. Magnets will lose their property.
2. These objects also will get affected.

Students can download 6th Science Term 1 Chapter 2 Force and Motion Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 2 Force and Motion

Samacheer Kalvi 6th Science Force and Motion Text Book Back Questions and Answers

I. Choose the Correct Answer:

Question 1.
Unit of speed is
a. m
b. s
c. kg
d. m/s
Answer:
d. m/s

Question 2.
Oscillatory motion among the following is
(a) Rotation of the earth about its axis
(b) Revolution of the moon about the earth
(c) To and fro movement of a vibrating string
(d) All of these
Answer:
(c) To and fro movement of a vibrating string

Question 3.
The correct relation among the following is
a. speed = distance × time
b. Speed = distance / time,
c. speed = time / distance
d. Speed = 1 / (distance × time)
Answer:
b. Speed = distance / time

Question 4.
Gita rides with her father’s bike to her uncle’s house which is 40 km away from her home. She takes 40 minutes to reach there.
Statement 1 : She travels with a speed of 1 km/minute.
Statement 2 : She travels with a speed of 1 km/hour
(a) Statement 1 alone is correct.
(b) Statement 2 alone is correct.
(c) Both Statement 1 and 2 are correct.
(d) Neither statement 1 nor statement 2 is correct.
Answer:
(a) Statement 1 alone is correct

II. Find whether the following statements are true or false. – if false give the correct Answer.

1. To and fro motion is called oscillatory motion.
2. Vibratory motion and rotatory motion are periodic motions.
3. Vehicles moving with varying speeds are said to be in uniform motion.
4. Robots will replace human in future.

Answer:

1. True
2. True
3. Non-uniform.
4. False, Robots can never be conscious.

III. Fill in the blanks:

1. A bike moving on a straight road is an example of ……… motion.
2. Gravitational force is a ………… force.
3. Motion of a potter’s wheel is an example of ………… motion.
4. When an object covers equal distances in equal interval of time, it is said to be in ……….. motion.

Answer:

1. Linear
2. non-contact
3. Rotatory
4. Uniform

IV. Match the following:

Answer:
1. – c
2. – d
3. – b
4. – a
5. – e

V. Analogy:

1. Kicking a ball: contact force :: falling of leaf : …………
2. Distance : metre :: Speed : ………….
3. circulatory motion : a spinning top oscillatory motion : …………

Answer:

1. non contact forces
2. m/s
3. Pendulum

VI. Given below is the distance – travelled by an elephant across a forest with uniform speed. 

Complete the data of the table given below with the idea of uniform speed.

Answer:

VII. Complete the web chart.

Answer:

VIII. Give one word for the following statements.

Question 1.
The force which acts on an object without Physical contact with it.
Answer:
Non-contact force.

Question 2.
A change in the position of an object with time.
Answer:
Motion.

Question 3.
The motion which repeats itself after a fixed interval of time.
Answer:
Oscillatory motion.

Question 4.
The motion of an object travels equal distances in equal intervals of time.
Answer:
Uniform motion.

Question 5.
A machine capable of carrying out a complex series of actions automatically.
Answer:
Robots.

IX. Answer the following in a sentence or two:

Question 1.
Define force.
Answer:
Forces are push or pull by an animate or inanimate agency.

Question 2.
Name different types of motion based on the path.
Answer:

1. Linear motion.
2. Curvilinear motion.
3. Circular motion.
4. Rotatory motion.
5. Oscillatory motion.
6. Zigzag (irregular) motion.

Question 3.
If you are sitting in a moving car will you be at rest or motion with respect to your friend sitting next to you?
Answer:
I am at rest with respect to my friend, sitting inside the car.

Question 4.
The rotation of the earth is a periodic motion. Justify.
Answer:
Motion repeated in equal intervals of time is called periodic motion. The earth rotates on its axis once in 24 hours. The duration of time is fixed as 24 hours. Therefore the rotation of the earth is a periodic motion.

Question 5.
Differentiate between rotational and curvilinear motion
Answer:

Rotational motion:

1. A body moves along a circular path.
2. Without changing its position, about its own (fixed) axis.
3. Eg. Rotation of a spinning top.

Curvilinear motion:

1. A body moves along a curved path.
2. Changes its position with motion.
3. Eg. Throwing paper airplanes or paper darts.

X. Calculate.

Question 1.
A vehicle covers a distance of 400 km in 5 hours calculate its average speed.
Answer:
Average speed = \(\frac{distence}{time}\)
= \(\frac{400}{5}\) = 80 km per hour

XI. Answer in detail:

Question 1.
What is motion? classify different types of motion with examples.
Answer:
Motion: The change of position of an object with respect to time is known as motion.

1. Based on Path:

• Linear motion. – Ex.: Parade of the soldiers.
• Curvilinear motion. – Ex.: Paper flight moving.
• Circular motion. – Ex.: Swirling stone tied to the rope.
• Rotatory motion. – Ex.: Rotating top.
• Oscillatory motion. – Ex.: Clock pendulum.
• Zigzag (irregular) motion. – Ex.: Motion of a bee.

2. Based on Duration :

• Periodic motion. – Ex.: Motion of a bob of simple Pendulum.
• Non-periodic motion. – Ex.: Swaying of the branches of a tree.

3. Based on Speed:

• Uniform motion. – Ex.: Hour hand of a clock.
• Non – uniform motion. – Ex.: Motion of a train, as it leaves a station.

XII. Fill with Examples

Answer:
Linear motion – A man walking in a straight road
Curvilinear motion – motion of paper Aeroplane
Self rotatory motion – Motion of wheel in a cart
Circular motion – Motion of moon a round earth.
Oscillatory motion – Motion of pendulum
Irregular motion – Motion of honey bee.

Samacheer Kalvi 6th Science Force and Motion Additional Important Questions and Answers

I. Choose the best option:

Question 1.
How earth revolves?
(a) From west to east
(b) east to west
(c) From north to south
(d) south to west.
Answer:
(a) From west to east

Question 2.
People walking in a crowded street is an example of _______ motion.
(a) linear
(b) circular
(c) rotatory
(d) zigzag
Answer:
(d) zigzag

Question 3.
What is the unit of average speed in SI system?
(a) metre / second
(b) kilometre/ seconds
(c) kilometre/ time
(d) Metre/ Time.
Answer:
(a) metre / second

Question 4.
Usain Bolt crossed 100 metre in _______ seconds and made a world record.
(a) 9.58
(b) 9.83
(c) 9.85
(d) 9.38
Answer:
(a) 9.58

Question 5.
The motion of the moon which revolves around the earth is
(a) Oscillatory motion
(b) Periodic motion
(c) curvilinear
(d) b and c
Answer:
(b) Periodic motion

II. Correct Answer: If it is wrong give the correct answer.

1. Change of position of an object with respect to time is motion
2. Swirling stone tied to the rope is an example of rotatory motion.
3. The children flying in a swing is a periodic motion.
4. All the oscillatory movements are periodic motions.
5. The SI unit of speed is kilometer

Answer:

1. correct
2. wrong.
   A swirling stone tied to the rope is an example of circular motion.
3. correct
4. correct
5. wrong, The SI unit of speed is meter.

III. Fill up the blanks:

1. People walking in a crowded street is ……….. type of motion.
2. Object moves not at a constant speed then the motion is ………..
3. If Priya in her cycle travels 40 km in 2 hours then what is her average speed?
4. Motion is of ………… types.
5. The movement of a body about its own axis is ………….

Answer:

1. Irregular
2. on- uniform motion
3. 20 km /hr
4. four
5. Rotatory motion

IV. Matching

Answer:
1. – b
2. – d
3. – a
4. – c

V. Fill up the blanks in accordance with their relation:

1. The Motion of train – uniform motion. The motion of vehicles ………..
2. Periodic motion – The motion of the moon revolves around the earth. Oscillatory motion ………..

Answer:

1. non – uniform motion.
2. Motion of simple pendulum.

VI. Fill up the missing statement.

VII. Fill up the blanks with the help of examples:

1. The motion of the needle of a clock.
2. The motion of an athlete of 100 m race
3. The motion of flag wagging
4. The motion of a car that goes in a circular path.
5. The motion of a needle in a sewing machine.

Answer:

1. Oscillatory motion.
2. Linear motion.
3. Non- periodic motion
4. circular motion
5. periodic motion or uniform motion.

VIII. Two Mark Questions: Short answers:

Question 1.
Define motion.
Answer:
When there is a change of position of an object with respect to time, then it is called motion.

Question 2.
What are the types of Force?
Answer:

1. Contact Force;
2. Non-Contact Force

Question 3.
List out the types of forces on the basis of contact.
Answer:
There are two types:

1. Contact force,
2. Non-contact force.

Question 4.
What is the average speed of the object?
Answer:
The distance travelled by an object in unit time is called the average speed of the object.

Question 5.
Define non-periodic motion.
Answer:
When a motion is not in uniform interval, then such motion is called non-periodic motion.

IX. Give Detailed Answers:

Question 1.
What is a force? What are its types?
Answer:
Forces: Forces are push or pull by an animate or inanimate agency.
Types of Forces:

1. Contact forces;
2. Non – Contact forces.

1. Contact forces: The force that is executed by touching the body is a contact force Eg. Kicking the football
2. Non – Contact forces: The force is applied. Without touching the object then it is called noncontact force.
Forces can
(i) Change the states of the body from rest to motion or motion to rest.
(ii) Either change the speed or direction or both of the body.
(iii) Change the shape of the body.

Students can download 6th Science Term 1 Chapter 1 Measurements Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements

Samacheer Kalvi 6th Science Measurements Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
The girth of a tree can be measured by
(a) Metre scale
(b) Metre rod
(c) plastic ruler
(d)Measuring tape.
Answer:
(d) Measuring tape.

Question 2.
The conversion of 7 m into cm gives
(a) 70 cm
(b) 7 cm
(c) 700 cm
(d) 7000 cm
Answer:
(c) 700 cm

Question 3.
Quantity that can be measured is called ………
(a) Physical quantity
(b) Measurement
(c) Unit
(d) Motion.
Answer:
(b) Measurement

Question 4.
Choose the correct one
(a) km > mm > cm > m
(b) km> mm> m > cm
(c) km>m>cm>mm
(d) km > cm > m > mm
Answer:
(c) km > m > cm > mm

Question 5.
While measuring length of an oject using a ruler, the position of your eye should be
(a) Left side of the point.
(b) Vertically above the point where the measurement is to be taken.
(c) Right side of the point.
(d) Anywhere according to one’s convenience.
Answer:
(b) Vertically above the point where the measurement is to be taken.

II. True or false.

1. We can say that mass an object is 126 kg
2. Length of one’s chest can be measured by using metre scale.
3. Ten millimetres makes one centimetre.
4. A hand span is a reliable measure of length.
5. The SI system of units is accepted everywhere in the world.

Answer:

1. True
2. False
3. True
4. False
5. True

III. Fill up the blanks:

1. SI unit of length is symbolically represented as ………..
2. 500 gm = …………. kilogram.
3. Distance between Delhi and Chennai can be measured in ……….
4. 1 m = ………. cm.
5. 5 km = ………. m.

Answer:

1. metre
2. 0.5
3. Kilometre
4. 100
5. 5000

IV. Analogy

Sugar: Beam Balance, Lime Juice?
Answer:
Graduated cylinders.

Height of a person: Cm: Length of your sharpened pencil lead?
Answer:
mm

Milk: Volume; vegetables?
Answer:
Weight

V. Match the following:

Answer:
1. Cubit
2. metre
3. 10^-9
4. second
5. 10³

VI. Complete the given table:

Answer:

VI. Arrange in increasing order of unit

1 Metre, 1 Centimetre, 1 Kilometre, and 1 Millimetre.
Answer:
1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

VIII. Find the answer for the following questions within the grid:

1. 10^-3 is one _______
2. SI unit of time ______
3. Cross view of reading for measurement leads to ______
4. _______ is the one what a clock reads.
5. ______ is the amount of substance present in an object.
6. _______ can be taken to get the final reading of the recordings of different students for a single measurement.
7. ______ is a fundamental quantity.
8. _______ shows the distance covered by an automobile.
9. A tailor use _______ to take measurements to stitch a cloth.
10. Liquids are measured with this physical quantity ______

Answer:

1. millimeter
2. Second
3. Parallax
4. Time
5. mass
6. Accurate
7. Length
8. Odometer
9. tape
10. litres

IX. Answer in a word or two.

Question 1.
What is the full form of the SI system?
Answer:
An International System of unit

Question 2.
Name any one instrument used for measuring mass.
Answer:
Beam Balance

Question 3.
Find the odd one out: Kilogram, Millimetre, Centimetre, Nanometre
Answer:
Kilogram.

Question 4.
What is the SI unit of mass?
Answer:
Kilogram

Question 5.
What are the two parts present in a measurement?
Answer:

1. multiple
2. sub

X. Answer in a sentence or two:

Question 1.
Define measurement.
Answer:
The comparison of an unknown quantity with some known quantity is known as measurement.

Question 2.
Define mass.
Answer:
Mass is the measure of the amount of matter in an object.

Question 3.
The distance between the two places is 43.65 km. convert it into meter and cm.
Answer:
(a) Convert km into metre
1 km = 1000m
∴ 43.65 km = 43.65 × 1000 = 43650.00 = 43650
= 43650 m.

(b) Convert km into cm.
1 km = 1000 m
1 m = 100 cm
1 km = 1000 × 100 cm
1 km = 100000 cm
∴ 43.65 km = 43.65 × 100000 = 4365000.00
= 4365000 cm.

Question 4.
What are the rules to be followed to make an accurate measurement with scale?
Answer:

1. Take care to write the correct submultiple.
2. Always keep the object in parallel to the scale.
3. Start the measurement from ‘0’ of the scale.

XI. Solve the following:

Question 1.
The distance between your school and your house is 2250 m. Express this distance in kilometre.
Answer:
Distance between school and house is 2250 m.
1000 m = 1 km
∴ 2250 m = 2250 ÷ 1000 = 2.25 km.

Question 2.
While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?
Answer:
Sharpened pencil Reading at one end = 2.0 cm.
Sharpened pencil Reading at the other end = 12.1 cm.
Length of the pencil = Difference between two ends.
= 12.1 cm. – 2.0 cm.
= 10.1 cm.

XII. Write in detail:

Question 1.
Explain two methods that you can use to measure the length of a curved line.
Answer:
Measuring the length of a curved line, by two methods.
First method – using a string.

1. Draw a curved line AB on the paper.
2. Place a string along the curved line.
3. Make sure that the string covers every bit of the curved line.
4. Mark the points where the curved line begins and ends on the string.
5. Now stretch the string along the length of a meter scale.
6. Measure the distance between two markings of the string.
7. This will give the length of a curved line.

Second method – using a divider.

1. Draw a curved line AB on a paper.
2. Separate the legs of the divider by 0.5 cm or 1 cm using a ruler.
3. Place it on the curved line starting from one end. Mark the position of the other end.
4. Move it along the line again and again cutting the line into a number of segments of equal lengths.
5. The remaining parts of the line can be measured using a scale.
6. Count the number of segments.
7. Length of the line = (No. of segments × length of each segment) + length of the leftover part.

Question 2.
Fill up the following chart.

Answer:

Samacheer Kalvi 6th Science Measurements Additional Important Questions and Answers

I. Choose the best option:

Question 1.
What is 7 m in mm?
(a) 0.7 mm
(b) 700 mm
(c) 7000 mm
(d) 70 mm
Answer:
(c) 7000 mm

Question 2.
The distance between one end and the other end is called _____
(a) mass
(b) length
(c) time
(d) None
Answer:
(b) length

Question 3.
What is the unit of length?
(a) metre
(b) litre
(c) second
(d) kilogram.
Answer:
(a) metre

Question 4.
Five kilometre is equal to _____
(a) 500 cm
(b) 500 m
(c) 5000 m
(d) 5000 cm
Answer:
(c) 5000 m

Question 5.
These are the instruments used in measuring the volume of objects with irregular shapes.
(a) Balance
(b) Electronic balance
(c) Displacement of water method
(d) sand clock.
Answer:
(c) Displacement of water method.

II. True or false:

1. The comparison of a known quantity with the unknown quantity is the mass.
2. The area can be calculated by using the two lengths and width.
3. Using electronic balance weight can be measured accurately.

Answer:

1. False
2. True
3. False.

III. Fill in the Blanks.

1. 78.75 cm = ______ m ______ cm
2. 1195 m = ______km ______ m
3. 15 cm 10 mm = ______ mm
4. 45 km 33 m = ______ m.
5. The metric system of unit is developed in the year ______ by French.

Answer:

1. -78 m, 75 cm
2. -1 km, 195 m
3. -160 mm
4. -45033 m
5. -1790

IV. Matching

Question 1.

Answer:
1. – d
2. – c
3. – b
4. – a

Question 2.

Answer:
1. – d
2. – c
3. – b
4. – a

V. Write the following unit in ascending order.

Question 1.
Ton – gram – kilogram – Metric ton
Answer:
Gram – kilogram – ton – metric ton.

VI. Very Short Answer (2 marks)

Question 1.
What is the length?
Answer:
The distance between one end and the other desired end is called length.

Question 2.
Differentiate mass from weight:
Answer:
Mass :
Mass is the measure of the amount of matter in an object.
Unit – kilogram

Weight :
Weight is the gravitational pull experienced by the mass.
Unit – Newton.

Question 3.
List the SI units of length, mass, and time.
Solution:

1. Length is measured by metre (m)
2. Mass is measured by the kilogram (kg)
3. Time is measured by second (s).

Question 4.
What is the basic quantity of physics?
Answer:

1. Length
2. Mass
3. Time.

Question 5.
Differentiate of Mass and Weight.
Answer:
Mass:

• Amount of matter in an object
• The measuring instrument is Beam balance

Weight:

• Gravitational pull experienced by the mass
• The measuring instrument is an electronic balance

Question 6.
What is the clock used to measure the time accurately?
Answer:

1. Electronic clock
2. Stop clock

Question 7.
Hold a sheet paper in one hand and a book in one hand. Which hand feels heavy? Why?
Solution:
The hand, which holds the book, will feel heavy. The mass of the book is more than that of a single sheet of paper. Therefore, the pull on the book is more than that of the paper. Hence our hand has to give more force to hold a book than a paper.

VII. Give detailed answers: (5 marks)

Question 1.
What are the features that we must give importance in measuring?
Answer:
The object should match with the ‘o’ of the scale.
The object should be in parallel with the scale.
Always start from ‘O’.
Measure the bigger division (m) first and then measure the smaller (mm) division. When we measure the bigger division it should be measured initially and then mark a point and then measure the smaller division (eg) if the length of the pencil is 6 cm 2 mm and then it is 6.2 cm.

Question 2.
How will you measure the weight of the object with irregular shapes?
Answer:
Fill a graduated measuring cylinder with 50 ml of water.
Tie the stone with a piece of fine thread and immerse the stone completely in the water. As the stone is immersed the water level will increase. And show 75 ml of rising. The stone displaces water and hence the rise. The amount of water displaced will be the volume of the stone.

Students can download 6th Science Term 2 Chapter 7 Parts of Computer Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 2 Chapter 7 Parts of Computer

Samacheer Kalvi 6th Science Parts of Computer Text Book Back Questions and Answers

I. Choose the correct answer:

Question 1.
Which one of the following is an output device?
(a) Mouse
(b) Keyboard
(c) Speaker
(d) Pen drive
Answer:
(c) Speaker

Question 2.
Name the cable that connects CPU to the Monitor
(a) Ethernet
(b) VGA cable
(c) HDMI
(d) USB
Answer:
(b) VGA cable

Question 3.
Which one of the following is an input device?
(a) Speaker
(b) Keyboard
(c) Monitor
(d) Printer
Answer:
(b) Keyboard

Question 4.
Which one of the following is an example for wireless connections?
(a) Wi-Fi
(b) Electric wires
(c) VGA
(d) USB
Answer:
(a) Wi-Fi

Question 5.
Pen drive is ……… device.
(a) Output
(b) Input
(c) Storage
(d) Connecting cable
Answer:
(c) Storage

II. Match the following

Answer:
1. – Connecting Cable
2. – wireless connection
3. – Output device
4. – Input device
5. – LDMI

III. Give Short Answer:

Question 1.
Name the parts of a computer.
Answer:
The computer has three parts like,
1. Input unit
2. Central Processing Unit
3. Output

Question 2.
Answer:

Activity

Look at the magic of connecting cables to desktop computer with 4,3,2,1 formula, start from 4 proceed till 1. Now your computer is ready to use.

By connecting the various parts of a computer we can assemble a computer. For the construction activity, students have to use 4-3-2-1 formula.

A system consist of mouse, key board, monitor, CPU, power cables, and connecting cables Students has to connect the four parts of a computer in row 4, using the cables in row 3, through the power cables in row 2 to construct a system.

Samacheer Kalvi 6th Science Parts of Computer Additional Important Questions and Answers

I. Choose the correct Answer:

Question 1.
Which one of the following is not important part of computer?
(a) Input device
(b) Output device
(c) Mouse
(d) Central Processing Unit
Answer:
(c) Mouse

Question 2.
The page on the monitor can be moved up and down using the _______
(a) Right button
(b) Scroll ball
(c) Left button
(d) Number key
Answer:
(b) Scroll ball

Question 3.
Which one of the following is an example for wireless connection.
(a) USB
(b) power cord
(c) HDMI
(d) wi-fi
Answer:
(d) wi-fi

Question 4.
The data is measured in units which is called as _______
(a) micron
(b) meter
(c) millimeter
(d) Bit
Answer:
(d) Bit

II. Fill in the Blanks

1. ………, ……….. plays a role of data in computer.
2. …….. controls the functions of all parts of the computer.
3. Memory unit divided into ………. types.
4. The data is measured in units which is called as ………..
5. Mouse is connected with the computer using ………..

Answer:

1. Numbers and alphabets
2. control unit
3. 2
4. Bit
5. USB cord or cable

III. Match the following

Answer:
1. – c
2. – d
3. – a
4. – e
5. – b

Students can download 6th Science Term 2 Chapter 6 Human Organ Systems Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 2 Chapter 6 Human Organ Systems

Samacheer Kalvi 6th Science Human Organ Systems Text Book Back Questions and Answers

I. Choose the correct answer:

Question 1.
The circulatory system transports these throughout the body
(a) Oxygen
(b) Nutrient
(c) Hormones
(d) All of these
Answer:
(d) All of these

Question 2.
Main organ of respiration in human body is
(a) Stomach
(b) Spleen
(c) Heart
(d) Lungs
Answer:
(d) Lungs

Question 3.
Breakdown of food into smaller molecules in our body is known as
(a) Muscle contraction
(b) Respiration
(c) Digestion
(d) Excretion
Answer:
(a) Digestion

II. Fill in the Blanks

1. A group of organs together make up an ………. system.
2. The part of the skeleton that protects the brain is …………
3. The process by which the body removes waste is ………..
4. The ………. is the largest sense organ in our body.
5. The endocrine glands produce chemical substances called …………

Answer:

1. Organ
2. Skull
3. Excretion
4. Skin
5. hormones

III. True or False. If False, give the correct answer.

1. Blood is produced in the bone marrow.
2. All the waste products of the body are excreted through the circulatory system.
3. The other name of the food pipe is an alimentary canal.
4. Thin tube-like structures which are the component of the circulatory system are called blood vessels.
5. The brain, the spinal cord, and nerves form the nervous system.

Answer:

1. False – RBC’s are produced in the bone marrow.
2. False – All the waste products are transported through the circulatory system.
3. False – The other name of the digestive tract is an alimentary canal.
4. True
5. True

IV. Match the following

Answer:
1. – c
2. – e
3. – b
4. – a
5. – d

V. Arrange in the correct sequence

Question 1.
Stomach → Large intestine → Oesophagus → Pharynx → Mouth → Small Intestine → Rectum → Anus
Answer:
Mouth → Pharynx → Oesophagus → Stomach → Small intestine → Large intestine → Rectum

Question 2.
Urethra → Ureter → Urinary Bladder → Kidney
Answer:
Kidney → Ureter → Urinary bladder → Urethra

VI. Analogy

1. Arteries : Carry blood from the heart:: ……….. : Carry blood to the heart.
2. Lungs : Respiratory system :: ……….. : Circulatory system.
3. Enzymes : Digestive glands :: ………… : Endocrine glands

Answer:

1. Veins
2. Heart
3. Hormones

VII. Give a Very short answer:

Question 1.
Describe the skeletal system.
Answer:

1. The skeletal system consists of bones, cartilages and joints.
2. Bones provide a framework for the body.
3. Bones along with muscles help in movements such as walking, running, chewing and dancing etc.

Question 2.
Write the functions of epiglottis?
Answer:

1. It prevents the entry of food into the windpipe.
2. It opens when the air enters the windpipe.

Question 3.
What are the three types of blood vessels?
Answer:

1. Arteries
2. Veins
3. Capillaries

Question 4.
Define the term “Trachea”
Answer:

1. The trachea commonly called “Windpipe” is a tube supported by cartilaginous rings.
2. It connects the pharynx and larynx to the lungs.
3. Allowing the passage of air.

Question 5.
Write any two functions of the digestive system.
Answer:

1. The digestive system is involved in the conversion of complex food substances into simple forms.
2. Absorption of digested food.

Question 6.
Name the important parts of the eye?
Three main parts.
Answer:

1. Cornea
2. Iris
3. Pupil

Question 7.
Name the five important sense organs.
Answer:

1. Eyes
2. Ears
3. Nose
4. Tongue
5. Skin

VIII. Give a short answer:

Question 1.
Write a short note on the rib cage.
Answer:

1. The rib cage is made up of 12 pairs of curved, flat rib bones.
2. It protects the delicate vital organs such as the heart and lungs.

Question 2.
List out the functions of the human skeleton.
Answer:

1. The skeletal system gives shape to the body.
2. Bones provide a framework for the body.
3. Bones along with muscles help in movements such as walking, running, chewing and dancing, etc.
4. It protects the soft internal organs.

Question 3.
Differentiate between the voluntary muscles and involuntary muscles.
Answer:

IX. Answer in detail:

Question 1.
List out the functions of the Endocrine system and Nervous system.
Answer:

1. Endocrine system regulates various functions of the body and maintains the internal environment.
2. Endocrine glands produce chemical substances called “Hormones’ which control various activities of the body.
   Eg. Growth hormone controls growth, the Adrenalin hormone acts at the time of fear stress, etc.

Functions of the nervous system:

1. Sensory input: The conduction of signals from sensory receptors.
2. Integration: The interpretation of the sensory signals and the formulation of responses.
3. Motor output: The conduction of signals from the brain and spinal card to effectors such as muscle and gland cells.

Question 2.
Label the diagram given below to show the four main parts of the urinary system and answer the following questions.

a. Which organ removes extra salts and water from the blood?
b. Where is the urine stored?
c. What is the tube through which urine is excreted out of the body?
d. What are the tubes that transfer urine from the kidneys to the urinary bladder called?
Answer:
a. The functional units of the kidney are called Nephrons which filter the blood and form the urine.
b. Urine is stored in the urinary bladder.
c. Urine is expelled out through the urethra.
d. The ureters that transfer urine from the kidneys to the urinary bladder.

X. Questions based on Higher Order Thinking Skills

Question 1.
What will happen if the diaphragm shows no movement?
Answer:

1. The diaphragm is the primary organ of breathing.
2. The movement of the diaphragm expands the lungs and creates a vacuum.
3. Due to this, the air is sucked in.
4. If the diaphragm does not move the lungs do not expand or contract and breathing stops.
5. The person will die.

Question 2.
Why is the heart divided into two halves by a thick muscular wall?
Answer:

1. The ventricles of the heart have thicker muscular walls than the atria.
2. The left ventricle also has a thicker muscular wall than the right ventricle.
3. This is due to the higher forces needed to pump blood through the systemic circuit compared to the pulmonary circuit.

Question 3.
Why do we sweat more in summer?
Answer:

1. Sweating plays an important health role as it helps to maintain constant body temperature by cooling us down.
2. When it is hot and we sweat that moisture evaporates and cools us immediately.
3. This is why we sweat more when the summer is very hot.

Question 4.
Why do we hiccup and cough sometimes when we swallow food?
Answer:
Reasons for hiccup and cough :

1. Eating too – quickly and swallowing air along with foods.
2. Eating too – many fatty or spicy foods in particular.
3. Drinking too much-carbonated beverages or alcohol can distend the stomach and irritate the diaphragm which can cause hiccups.

Samacheer Kalvi 6th Science Human Organ Systems Additional Important Questions and Answers

I. Choose the right answer:

Question 1.
A newborn baby has ……….. bones.
(a) 206
(b) More than 200
(c) More than 300
(d) 210
Answer:
(c) More than 300

Question 2.
_______ connect bone to muscle.
(a) Skeleton
(b) Tendons
(c) Cartilages
(d) Ligaments
Answer:
(b) Tendons

Question 3.
The walls of the heart is made up of
(a) Voluntary muscles
(b) Cardiae muscles
(c) Involuntary muscles
(d) Biceps muscle
Answer:
(b) Cardiac muscles

Question 4.
_______ muscles are found in the walls of the digestive tract, urinary bladder arteries, and other internal organs.
(a) Bone
(b) Smooth
(c) Cardiac
(d) triceps
Answer:
(b) Smooth

Question 5.
The bronchi divide further and end in small air sacs called
(a) Cerebrum
(b) Thymus
(c) Alveoli
(d) Pinna
Answer:
(c) Alveoli

II. Fill in the blanks:

1. The adult human skeletal system consists of 206 bones and a few ………., ……… and ………..
2. The brain is covered by a three-layered tissue covering called………..
3. When we are walking, running or climbing the balance of the body is maintained by ………….
4. The endocrine gland present in the chest is …………..
5. The ………. brings blood containing oxygen and urea from the aorta to the kidneys.
6. connects the brain to a different part of the body through nerves.

Answer:

1. cartilages, ligaments, and tendons
2. meninges
3. Ears
4. Thymus Gland
5. renal artery
6. spinal cord

III. Match the Following:

Answer
1. – iii.
2. – i.
3. – iv.
4. – v.
5. – ii.

IV. Arrange in the correct sequence

Question 1.
Trachea → Bronchi → Pharynx → Lungs → Larynx → Nasal cavity → Nostrils → Bronchiole → Alveolus
Answer:
Nostrils → Nasal cavity → Pharynx → Larynx → Trachea → Bronchi → Bronchiole → Alveolus

Question 2.
Middle ear → Pinna → Outer ear → Inner ear
Answer:
Pinna → Outer ear → Middle ear → Inner ear.

V. Analogy

1. Skull: Made up of cranial bones and facial bones :: ………… : Made up of 12 pairs of curved flat rib bones
2. Biceps : Bends the arm at the elbow :: ……….. : Straightens the elbow

Answer:

1. Ribcage
2. Triceps

VI. Very Short Answer:

Question 1.
What are the two major divisions of the skeletal system?
Answer:
The two major divisions of the skeletal system are.

1. Axial skeleton
2. Appendicular skeleton.

Question 2.
Name the auditory ossicles.
Answer:

1. Malleus
2. Incus
3. Stapes

Question 3.
Which is the longest bone in our body?
Answer:
The thigh bone (femur) is the longest bone.

Question 4.
What is the name of the muscles in the heart?
Answer:
Cardiac muscle.

Question 5.
What is the length of the Alimentary canal?
Answer:
9 metres.

VII. Answer in detail:

Question 1.
Tabulate the differences between arteries and veins.
Answer:
Arteries:

1. Carry blood from the heart to all parts of the body.
2. Carry oxygenated blood (Except pulmonary artery).
3. They have thick elastic muscular walls.
4. Valves are absent.
5. Blood flows under high pressure.

Veins:

1. Carry blood from all parts of the body back to the heart.
2. Carry deoxygenated blood (Except pulmonary vein).
3. They have thin non-elastic valves.
4. Valves are present to prevent the backward flow of blood.
5. Blood flows under low pressure.

Question 2.
Differentiate arteries from a vein and tabulate your answer.
Answer:

Students can download Maths Chapter 2 Integers Ex 2.1 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 2 Integers Ex 2.1

Question 1.
Fill in the blanks:
(i) The potable water available at 100 m below the ground level is denoted as ……… m.
(ii) A swimmer dives to a depth of 7 feet from the ground into the swimming pool. The integer that represents this, is ……… feet.
(iii) -46 is to the ……….. of -35 on the number line.
(iv) There are ……… integers from -5 to +5 (both inclusive)
(v) …….. is an integer which is neither positive nor negative.
Solution:
(i) 100
(ii) -7
(iii) left
(iv) 11
(v) 0

Question 2.
Say True or False
(i) Each of the integers -18, 6, -12, 0 is greater than -20.
(ii) -1 is to the right of 0.
(iii) -10 and 10 are at equal distance from 1.
(iv) All negative integers are greater than zero.
(v) All whole numbers are integers.
Solution:
(i) True
(ii) False
(iii) False
(iv) False
(v) True

Question 3.
Mark the numbers 4, -3, 6, -1 and -5 on the number line.
Solution:

Question 4.
On the number line, which number is
(i) 4 units to the right of -7?
(ii) 5 units to the left of 3?
Solution:
(i) -3
(ii) -2

Question 5.
Find the opposite of the following numbers.
(i) 44
(ii) -19
(iii) 0
(iv) -312
(v) 789
Solution:
(i) Opposite of 44 is – 44
(ii) Opposite of-19 is + 19 or 19
(iii) Opposite of 0 is 0
(iv) Opposite of-312 is + 312 or 312
(v) Opposite of 789 is – 789.

Question 6.
If 15 km east of a place is denoted as +15 km, What is the integer that represents 15 km west of it?
Solution:
Opposite of east is west.
∴ If 15 km east is + 15 km, then 15 km west is – 15 km.

Question 7.
From the following number lines, identify the correct and the wrong representations with reason.

Solution:
(i) Wrong, Integers are not continuously marked
(ii) Correct, Integers are correctly marked.
(iii) Wrong, Integer -2 is marked wrongly.
(iv) Correct, Integers are marked at equal distance.
(v) Wrong, negative integers marked wrongly.

Question 8.
Write all the integers between the given numbers.
(i) 7 and 10
(ii) -5 and 4
(iii) -3 and 3
(iv) -5 and 0
Solution:
(i) 8, 9
(ii) -4, -3, -2, -1, 0, 1, 2, 3
(iii) -2, -1, 0, 1, 2
(iv) -4, -3, -2, -1

Question 9.
Put the appropriate signs as <, > or = in the blank.
(i) -7 ___ 8
(ii) -8 ___ -7
(iii) -999 ___ -1000
(iv) 0 ___ -200
Solution:
(i) <
(ii) <
(iii) >
(iv) =
(v) >

Question 10.
Arrange the following integers in ascending order.
(i) -11, 12, -13, 14, -15, 16, -17, 18, -19, -20
(ii) -28, 6, -5, -40, 8, 0, 12, -1, 4, 22
(iii) -100, 10, -1000, 100, 0, -1, 1000, 1, -10
Solution:

(i) -11, 12, -13, 14, -15, 16, -17, 18, -19, -20

• First separating the positive integers 12, 14, 16, 18 and the negative integers -11,-13,-15,-17,-19,-20.
• Then arranging the positive integers in ascending order we get 12, 14, 16, 18 and negative integers in ascending order as -20, -19, -17, -15, -13, -11 4
• Now the ascending order : -20, -19, -17, -15, -13, -11, 12, 14, 16, 18.

(ii) -28, 6, -5, -40, 8, 0, 12, -1, 4, 22

• Positive integers are 6, 8, 12, 4, 22 Negative integers are -28, -5, -40, -1
• Arranging the positive integers in ascending order we get 4, 6, 8, 12, 22 and the negative integers in ascending order -40, -28, -5, -1
• The number 0 is neither positive nor negative and stands in the middle.
• In ascending order : -40, -28, -5, -1, 0, 4, 6, 8,12, 22

(iii) -100, 10, -1000, 100, 0, -1, 1000, 1, -10

• Separating positive integers 10, 100, 1000, 1 and negative integers -100, -1000, -1, -10.
• Now the positive integers in ascending order 1,10,100,1000 and the negative integers in ascending order. -1000, -100, -10, -1
• Also ‘0’ stand in the middle as its is neither positive nor negative.
• ∴ The numbers in ascending order: -1000, -100, -10, -1, 0, 1, 10, 100, 1000.

Question 11.
Arrange the following integers in descending order.
(i) 14, 27, 15, -14, -9, 0, 11, -17
(ii) -99, -120, 65, -46, 78, 400, -600
(iii) 111, -222, 333, -444, 555, -666, 777, -888
Solution:
(i) 27, 15, 14, 11, 0, -9, -14, -17
(ii) 400, 78, 65, -46, -99, -120, -600
(iii) 777, 555, 333, 111, -222, -444, -666, -888

Objective Type Questions

Question 12.
There are ……… positive integers from -5 to 6.
(a) 5
(b) 6
(c) 7
(d) 11
Solution:
(c) 7

Question 13.
The opposite of 20 units to the left of 0 is
(a) 20
(b) 0
(c) -20
(d) 40
Solution:
(a) 20

Question 14.
One unit to the right of -7 is
(a) +1
(b) -8
(c) -7
(d) -6
Solution:
(d) -6

Question 15.
3 units to the left of 1 is
(a) -4
(b) -3
(c) -2
(d) 3
Solution:
(c) -2

Question 16.
The number which determines marking the position of any number to its opposite on a number line is
(a) -1
(b) 0
(c) 1
(d) 10
Solution:
(b) 0

Students can download Maths Chapter 1 Fractions Ex 1.2 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 1 Fractions Ex 1.2

Miscellaneous Practice Problems

Question 1.
Sankari purchased 2\(\frac{1}{2}\) m cloth to stich a long skirt and 1\(\frac{3}{4}\) m cloth to stitch blouse. If the cost is Rs. 120 per metre then find the cost of cloth purchased by her.
Solution:
Total cloth purchased

cost of 1 metre = Rs. 120
Total cost of cloth purchased
= Rs. 120 × \(\frac{17}{4}\)
= Rs. 510

Question 2.
From his office, a person wants to reach his house on foot which is at a distance of 5\(\frac{3}{4}\) km. If he had walked 2\(\frac{1}{2}\) km, how much distance still he has to walk to reach his house?
Solution:

Question 3.
Which is smaller? The difference between 2\(\frac{1}{2}\) and 3\(\frac{2}{3}\) or the sum of 1\(\frac{1}{2}\) and 2\(\frac{1}{4}\).
Solution:

∴ The difference of 2\(\frac{1}{2}\) and 3\(\frac{2}{3}\) is smaller

Question 4.
Mangai bought 6\(\frac{3}{4}\) kg of apples. If Kalai 1 bought 1\(\frac{1}{2}\) times a Mangai bought, then how many kilograms of apples did Kalai buy?
Solution:
Apples bought by Mangai = 6\(\frac{3}{4}\) kg
Apples bought by Kalai

Question 5.
The length of the staircase is 5\(\frac{1}{2}\) m. If one step is set at \(\frac{1}{4}\) m, then how many steps will be there in the staircase?

Solution:
Total length of the staircase = 5\(\frac{1}{2}\) m
length of each step = \(\frac{1}{4}\) m
No of steps in the stair case

= 22 steps

Challenge Problems

Question 6.
By using the following clues, find who am I?
(i) Each of my numerator and denominator is a single-digit number.
(ii) The sum of my numerator and denominator is a multiple of 3.
(iii) The product of my numerator and denominator is a multiple of 4.
Solution:
The numerator may be any one of!, 2, 3,4, 5, 6, 7, 8, 9 and the denominator may be any one of 1, 2,3,4, 5,6, 7,8,9. Sum of numerator and denominator is a multiple of 3.
∴ Possible proper fractions are \(\frac{1}{2}, \frac{1}{5}, \frac{1}{8}, \frac{2}{4}, \frac{2}{7}, \frac{3}{6}, \frac{3}{9}, \frac{4}{5}, \frac{4}{8}, \frac{5}{7}, \frac{6}{9}\)
Also given the product of numerator and denominator is a multiple of 4.
∴ Possible fractions are \(\frac{1}{8}, \frac{2}{4}, \frac{4}{5}, \frac{4}{8}\)

Question 7.
Add the difference between 1\(\frac{1}{3}\) and 3\(\frac{1}{6}\) and the difference between 4\(\frac{1}{6}\) and 2\(\frac{1}{3}\)
Solution:

Adding Difference

Question 8.
What fraction is to be subtracted from 9\(\frac{3}{7}\) to get 3\(\frac{1}{5}\)?
Solution:
Let the fraction be x
According to the problem

The fraction to be subtracted is 6\(\frac{8}{35}\)

Question 9.
The sum of two fractions is 5\(\frac{3}{9}\). If one of the fractions is 2\(\frac{3}{4}\), find the other fraction.
Solution:
Let the other fraction be x
According to the problem,

∴ The other fraction is 2\(\frac{7}{12}\)

Question 10.
By what number should 3\(\frac{1}{16}\) be multiplied to get 9\(\frac{3}{16}\)?
Solution:
Let the number be x
According to the problem,

x = 3
The number is 3

Question 11.
Complete the fifth row in the Leibnitz triangle which is based on subtraction.

Solution:

Question 12.
A painter painted \(\frac{3}{8}\) of the wall of which one third is painted in yellow colour. What fraction is the yellow colour of the entire wall?

Solution:
yellow colour of the entire wall
= \(\frac{3}{8}\) × \(\frac{1}{3}\)
= \(\frac{1}{8}\)

Question 13.
A rabbit has to cover 26\(\frac{1}{4}\) m to fetch its food. If it covers 1\(\frac{3}{4}\) m in one jump, then how many jumps will it take to fetch its food?

Solution:
Total distance = 26\(\frac{1}{4}\) m
Distance covered in one jump = 1\(\frac{3}{4}\) m
Number of jumps required to fetch the food

= 15

Question 14.
Look at the picture and answer the following questions.

(i) What is the distance from the school to Library via Bus stop?
(ii) What is the distance between School and Library via Hospital?
(iii) Which is the shortest distance between (i) and (ii)?
(iv) The distance between School and Hospital is times the distance between School and Bus stop.
Solution:


(iii) Via bus stop
(iv) 6 times (6 × \(\frac{3}{4}\) = \(\frac{18}{4}\) = \(\frac{9}{2}\) = 4\(\frac{1}{2}\))

Students can download Maths Chapter 1 Fractions Ex 1.1 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 1 Fractions Ex 1.1

Question 1.
Fill in the blanks:
(i) 7\(\frac{3}{4}\) + 6\(\frac{1}{2}\) ………..
(ii) The sum of a whole number and a proper fraction is called ……….
(iii) 5\(\frac{1}{3}\) – 3\(\frac{1}{2}\) ………..
(iv) 8 ÷ \(\frac{1}{2}\) ………..
(v) The number which has its own reciprocal is ……….
Solution:

(ii) Mixed Fraction

(iii) 5\(\frac{1}{3}\) – 3\(\frac{1}{2}\)
= \(\frac{16}{3}\) – \(\frac{7}{2}\) = \(\frac{32-21}{6}\) = \(\frac{11}{6}\)
= 1\(\frac{5}{6}\)

(iv) 8 ÷ \(\frac{1}{2}\)
= 8 × \(\frac{2}{1}\)
= 16

(v) 1

Question 2.
Say True or False
(i) 3\(\frac{1}{2}\) can be written as 3 + \(\frac{1}{2}\).
(ii) The sum of any two proper fractions is always an improper fraction.
(iii) The mixed fraction of \(\frac{13}{4}\) is 3\(\frac{1}{4}\).
(iv) The reciprocal of an improper fraction is always a proper fraction.
(v) 3\(\frac{1}{4}\) × 3\(\frac{1}{4}\) = 9\(\frac{1}{16}\)
Solution:
(i) True
(ii) False
(iii) True
(iv) True
(v) False

Question 3.
Answer the following:
(i) Find the sum of \(\frac{1}{7}\) and \(\frac{3}{9}\).
(ii) What is the total of 3\(\frac{1}{3}\) and 4\(\frac{1}{6}\)?
(iii) Simplify: 1\(\frac{3}{5}\)+5\(\frac{4}{7}\).
(iv) Find the difference between \(\frac{8}{9}\) and \(\frac{2}{7}\)
(v) Subtract: 1\(\frac{3}{5}\) from 2\(\frac{1}{3}\).
(vi) Simplify: 7\(\frac{2}{7}\) – 3\(\frac{4}{21}\)
Solution:
(i) \(\frac{1}{7}\) + \(\frac{3}{9}\)
= \(\frac{9+21}{63}\) = \(\frac{30}{63}\) = \(\frac{10}{21}\)

Question 4.
Convert mixed fractions into improper fractions and vice versa:
(i) 3\(\frac{7}{18}\)
(ii) \(\frac{99}{7}\)
(iii) \(\frac{47}{6}\)
(iv) 12\(\frac{1}{9}\)
Solution:
(i) 3\(\frac{7}{18}\) = \(\frac{61}{18}\)
(ii) \(\frac{99}{7}\) = 14\(\frac{1}{7}\)
(iii) \(\frac{47}{6}\) = 7\(\frac{5}{6}\)
(iv) 12\(\frac{1}{9}\) = \(\frac{109}{9}\)

Question 5.
Multiply the following:
(i) \(\frac{2}{3}\) × 6
(ii) 8\(\frac{1}{3}\) × 5
(iii) \(\frac{3}{8}\) × \(\frac{4}{5}\)
(iv) 3\(\frac{5}{7}\) × 1\(\frac{1}{13}\)
Solution:
(i) \(\frac{2}{3}\) × 6 = 4

(ii) 8\(\frac{1}{3}\) × 5
= \(\frac{25}{3}\) × 5
= \(\frac{125}{3}\)
= 41\(\frac{2}{3}\)

(iii) \(\frac{3}{8}\) × \(\frac{4}{5}\)
= \(\frac{12}{40}\) = \(\frac{3}{10}\)

(iv) 3\(\frac{5}{7}\) × 1\(\frac{1}{13}\)
= \(\frac{26}{7}\) × \(\frac{14}{13}\)
= \(\frac{4}{1}\)
= 4

Question 6.
Divide the following
(i) \(\frac{3}{7}\) ÷ 4
(ii) \(\frac{4}{3}\) ÷ \(\frac{5}{9}\)
(iii) 4\(\frac{1}{5}\) ÷ 3\(\frac{3}{4}\)
(iv) 9\(\frac{2}{3}\) ÷ 1\(\frac{2}{3}\)
Solution:
(i) \(\frac{3}{7}\) ÷ 4
= \(\frac{3}{7}\) × \(\frac{1}{4}\) = \(\frac{3}{28}\)

(ii) \(\frac{4}{3}\) ÷ \(\frac{5}{9}\)
= \(\frac{4}{3}\) × \(\frac{9}{5}\)
= \(\frac{12}{5}\)
= 2\(\frac{2}{5}\)

Question 7.
Gowri purchased 3\(\frac{1}{2}\) kg of tomatoes, \(\frac{3}{4}\) kg of brinjal and 1\(\frac{1}{4}\) kg of onion. What is the total weight of the vegetables she bought?
Solution:
Total weight of vegetables bought

Question 8.
An oil tin contains 3\(\frac{3}{4}\) litres of oil of which 2\(\frac{1}{2}\) litres of oil is used. How much oil is left over?
Solution:

Question 9.
Nilavan can walk 4\(\frac{1}{2}\) km in an hour. How much distance will he cover in 3\(\frac{1}{2}\) hours?
Solution:
Distance walked in an hour = 4\(\frac{1}{2}\) km
Distance covered in 3\(\frac{1}{2}\)
Hours

Question 10.
Ravi bought a curtain of length 15\(\frac{3}{4}\) m. If he cut the curtain into small pieces each of length 2\(\frac{1}{4}\) m, then how many small curtains will he get?
Solution:
Total length = 15\(\frac{3}{4}\)
Length of the small pieces = 2\(\frac{1}{4}\)
Small curtains obtained

= 7

Objective Type Questions

Question 11.
Which of the following statement is incorrect?
(a) \(\frac{1}{2}\) > \(\frac{1}{3}\)
(b) \(\frac{7}{8}\) > \(\frac{6}{7}\)
(c) \(\frac{8}{9}\) < \(\frac{9}{10}\)
(d) \(\frac{10}{11}\) > \(\frac{9}{10}\)
Solution:
(d) \(\frac{10}{11}\) > \(\frac{9}{10}\)

Question 12.
The difference between \(\frac{3}{7}\) and \(\frac{2}{9}\) is
(a) \(\frac{13}{63}\)
(b) \(\frac{1}{9}\)
(c) \(\frac{1}{7}\)
(d) \(\frac{9}{16}\)
Solution:
(a) \(\frac{13}{63}\)

Question 13.
The reciprocal of \(\frac{53}{17}\) is
(a) \(\frac{53}{17}\)
(b) 5\(\frac{3}{17}\)
(c) \(\frac{17}{53}\)
(d) 3\(\frac{5}{17}\)
Solution:
(c) \(\frac{17}{53}\)

Question 14.
If \(\frac{6}{7}=\frac{\mathbf{A}}{49}\), then the value of A is
(a) 42
(b) 36
(c) 25
(d) 48
Solution:
(a) 42
Hint: \(\frac{6 \times 49}{7}=42\)

Question 15.
Pugazh has been given four choices for his pocket money by his father. Which of the choices should he take in order to get the maximum money?
(a) \(\frac{2}{3}\) of Rs 150
(b) \(\frac{3}{5}\) of Rs 150
(c) \(\frac{4}{5}\) of Rs 150
(d) \(\frac{1}{5}\) of Rs 150
Solution:
(c) \(\frac{4}{5}\) of Rs 150

Students can download Maths Chapter 5 Information Processing Ex 5.2 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Ex 5.2

Miscellaneous Practice Problems

Question 1.
Write the missing numbers in the trees.

Solution:

Question 2.
Write the missing operations in the trees.

Solution:

Question 3.
Check whether the Tree diagrams are equal or not.

Solution:
c ÷ (a ÷ b), a ÷ (b ÷ c) Not equal

Challenge Problems

Question 4.
Convert ti e following questions into tree diagrams:
(i) The number of people who visited a library in the last 5 months were 1210, 2100, 2550, 3160 and 3310. Draw the tree diagram of the total number of people who had used the library for the 5 months.
(ii) Ram had a bank deposit of Rs. 7,55,250 and he had withdrawn Rs. 5,34,500 for educational purpose. Find the amount left in his account. Draw a tree diagram for this.
(iii) In a cycle factory, 1,600 bicycles were manufactured on a day. Draw tree diagram to find the number of bicycle produced in 20 days.
(iv) A company with 30 employees decided to distribute Rs. 90, 000 as a special bonus equally among its employees. Draw tree diagram to show how much will each receive?
Solution:

Question 5.
Write the numerical expression which gives the answer 10 and also convert into tree diagram.
Solution:

Question 6.
Use brackets in appropriate place to the expression 3 x 8 – 5 which gives 19 and convert it into tree diagram for it.
Solution:

= 3 × 8 – 5
= (3 × 8) – 5 = 24 – 5
= 19

Question 7.
A football team gains 3 and 4 points for successive 2 days and loses 5 points on the third day. Find the total points scored by the team and also represent this in tree diagram.
Solution:

Students can download Maths Chapter 5 Statistics Ex 5.4 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 1 Chapter 5 Statistics Ex 5.4

Miscellaneous Practice Problems

Question 1.
The heights (in centimeters) of 40 children are.

Prepare a tally marks table.
Solution:

Question 2.
There are 1000 students in a school. Data regarding the mode of transport of the students is given below. Draw a pictograph to represent the data.

Solution:
Mode of transport of the students
Scale: 1 Unit=100 Students

Question 3.
The following pictograph shows the total savings of a group of friends in a year. Each .picture represents a saving of Rs.100. Answer the following questions.

(i) What is the Ratio of Ruby’s saving to that of Thasnim’s?
(ii) What is the ratio of Kuzhali’s savings to that of others?
(iii) How much is Iniya’s savings?
(iv) Find the total amount of savings of all the friends?
(v) Ruby and Kuzhali save the same amount. Say True or False.
Solution:
(i) Ratio of Ruby’s saving to that of Thasnim’s
\(=\frac{\text { Ruby’s saving }}{\text { Thasnim’s saving }}=\frac{5 \times 100}{4 \times 100}=\frac{5}{4}=5: 4\)
Ratio of Ruby’s saving to that of Thasnims = 5 : 4
(ii) Ratio of Kuzhali’s savings to that of others
\(=\frac{\text { kuzhali’s saving }}{\text { others saving }}=\frac{5 \times 100}{19 \times 100}=\frac{5}{19}=5: 19\)
Ratio of Kuzhali’s saving to that of others = 5 : 19
(iii) Iniya’s saving = 3 × 100 = ₹ 300
(iv) Saving of all the friends = (5 + 7 + 4 + 5 + 3) × 100 = 24 × 100 = ₹ 2400.
Total savings = ₹ 2400
(v) True.

Challenging Problems

Question 4.
The table shows the numbers of moons that orbit each of the planets in oar solar system.

Make a Bar graph for the above data.
Solution:
Number of moons that orbit each of the planets in our solar system
Scale: 1 Unit = 2 moons

Question 5.
The prediction of the weather in the month of September is given below.

(i) Make a frequency table of the types of weather by reading the calendar.
(ii) How many days are either cloudy or partly cloudy?
(iii) How many days do not have rain? Give two ways to find the answer?
(iv) Find the ratio of the number of Sunny days to Rainy days.
Solution:
(i)
(ii) 14 days
(iii) 24 days (30 – 6 = 24 days)
(iv) 10 : 6

Question 6.
26 students were interviewed to find out what they want they to become in future. Their responses are given in the following table.

Represent this data using pictograph.
Solution:
Students responses in an interview about their future profession
Scale: 1 Unit = 1 student

Question 7.
Yasmin of class VI was given a task to count the number of books which are biographies, in her school library. The information collected by her is represented as follows.

Observe the pictograph and answer the following questions.
(i) Which title has the maximum number of biographies?
(ii) Which title has the minimum number of biographies?
(iii) Which title has exactly half the number of biographies as Novelists?
(iv) How many biographies are there on the title of sportspersons?
(v) What is the total number of biographies in the library?
Solution:
(i) ‘The title Novelists’ have the maximum number of biographies
(ii) ‘The title Scientists’ have a minimum number of biographies.
(iii) ‘Sportspersons’ title has exactly half the number of biographies as Novelist.
(iv) \((1 \times 20)+\frac{20}{4}=20+5=25\) biographies are there in the title sportsperson.
(v) 8 × 20 = 160 biographies are there in the library.

Question 8.
The bar graph illustrates the results of a survey conducted on vehicles crossing over a Toll Plaza in one hour.

Observe the bar graph carefully and fill up the following table.

Solution:
Vans = 50; Buses = 40; Cars = 65; Others = 15
Total Vehicles = 245

Question 9.
The lengths (in the nearest centimeter) of 30 drumsticks are given as follows.

Draw the bar graph showing the same information.
Solution:
The lengths (in nearest cm) of drumsticks
Scale : 1 Unit = 1 drumstick