MCQ on Measurement of Length and Motion Body Class 6
Class 6 Science Chapter 5 MCQ Measurement of Length and Motion
Choose the correct option:
Question 1.
Which tool is used to measure longer lengths like the height of a room?
(a) Ruler
(b) Measuring tape
(c) Compass
(d) Handspan
Answer:
(b) Measuring tape
Question 2.
Which unit would you use to measure the thickness of a coin?
(a) Metre
(b) Kilogram
(c) Millimetre
(d) Kilometre
Answer:
(c) Millimetre
Question 3.
Each metre (m) is divided into 100 equal divisions, called
(a) millimetre
(b) centimetre
(c) decimetre
(d) kilometre
Answer:
(b) centimetre
Question 4.
A ball rolling on the ground represents
(a) rectilinear motion
(b) rotational motion
(c) both (a) and (b)
(d) none of these
Answer:
(c) both (a) and (b)
Question 5.
Which type of motion is exhibited by a swinging pendulum?
(a) Linear motion
(b) Circular motion
(c) Oscillatory motion
(d) Rotational motion
Answer:
(c) Oscillatory motion
Question 6.
We measure the length of a room in the unit
(a) kilometre
(b) metre
(c) both (a) and (b)
(d) milimetre
Answer:
(b) metre
Question 7.
What do we use to measure curved lengths?
(a) Thread
(b) Wood
(c) Sand
(d) Paper
Answer:
(a) Thread
Fill in the Blanks :
Complete the following with a suitable word/ words:
(i) A __________ is used for measuring the length of table.
Answer:
measuring tape/ruler
(ii) 2000 cm is equal to __________ m.
Answer:
20
(iii) The length of a curved line can be measured by using a __________ .
Answer:
thread or measuring tape
(iv) The motion of moon around earth is __________ motion.
Answer:
periodic
(v) A pluncked string of a sitar executes __________ motion.
Answer:
periodic/oscillatory
(vi) Motion that __________ itself aftor same period of time is called periodic motion.
Answer:
repeats
(vii) The earth moving in its orbit shows __________ as well as __________ motion.
Answer:
circular, rotational
(viii) The basic unit of length in the metric system is the __________.
Answer:
metre
(ix) 10 m is equal to __________ cm.
Answer:
1000
(x) Circular motion involves movement around a __________ point.
Answer:
centre
(xi) 1 cm = __________ mm.
Answer:
10
(xii) 1 km = __________ m.
Answer:
1000
(xiii) We can use a __________ to measure the size of our chest.
Answer:
measuring tape
(xiv) Motion of blade of an electric fan is an example of __________ motion.
Answer:
circular
(xv) Motion of pendulum of a clock is an example of __________ motion.
Answer:
oscillatory
Match the Following :
| Column A | Column B |
| (a) 100 cm | (i) Rectilinear motion and rotation mofion |
| (b) 1 cm | (ii) 10 mm |
| (c) March-past of soldiers in a parade | (iii) Periodic motion |
| (d) The motion of blades of an electric fan | (iv) 1 m |
| (e) The motions of strings of a guitar | (v) Rectilinear motion |
| (f) The ball rolling on the ground | (vi) Circular motion |
Answer:
| Column A | Column B |
| (a) 100 cm | (iv) 1 m |
| (b) 1 cm | (ii) 10 mm |
| (c) March-past of soldiers in a parade | (v) Rectilinear motion |
| (d) The motion of blades of an electric fan | (vi) Circular motion |
| (e) The motions of strings of a guitar | (iii) Periodic motion |
| (f) The ball rolling on the ground | (i) Rectilinear motion and rotation motion |
True/False :
Write ‘True’ or ‘False’ against the statements given below:
1. The SI unit of distance is cm .
Answer:
False
2. The motion of a spinning top is linear motion.
Answer:
False
3. The motion of a body falling freely under gravity is linear motion.
Answer:
True
4. A ruler/metre rod can be used for measuring a curved line.
Answer:
False
5. Linear motion occurs when an object moves in a curved path.
Answer:
False
6. A ruler is used to measure longer lengths like the height of a building.
Answer:
False
7. A rotating fan is an example of rotational motion.
Answer:
True
8. Motion of a wheel of a car is rectilinear as well as circular motion.
Answer:
True
9. A cloth merchant uses a metre rod to measure the length of cloth.
Answer:
True
10. A child swinging on a swing shows rectilinear motion.
Answer:
False
11. The object which does not change its position with time is said to be at rest.
Answer:
True
12. A motion which takes place along a curved path is called circular motion.
Answer:
True
13. The needle of a swing machine is random motion.
Answer:
False
14. Metre is the unit of length in SI system.
Answer:
True
15. A flying bird in the sky is at rest.
Answer:
False
Assertion-Reason type Questions :
Directions (Q. No. 1 to 5): The question below consists of an Assertion (A) and a Reason (R). Use the following key to choose the appropriate answer.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Question 1.
Assertion (A): For measurements we use International System of Units.
Reason (R): kg is the SI unit of length.
Answer:
(c) A is true but R is false.
Question 2.
Assertion (A): For measuring the length (L) of an object choose a appropriate device.
Reason (R): We can measure the length (L) of a curved line directly by using a meter scale.
Answer:
(c) A is true but R is false.
Question 3.
Assertion (A): The objects which are move along a straight line are known as rectilinear motion.
Reason (R): The objects which are moving in a circular form are called ‘circular motion’ of that objeot.
Answer:
(b) Both A and R are true but R is not the correct explanation of A.
Question 4.
Assertion (A): A branch of a tree moving ‘to and fro’, motion of a child on a swing and strings of a guitar are the example of periodic motion. Reason (R): The motion in which an object repeats it’s motion after same time is known as periodic motion.
Answer:
(a) Both A and R are true and R is the correct explanation of A.
Question 5.
Assertion (A): The unit of any physical quantity which is acceptable to all of the people as basic unit is called standard unit.
Reason (R): SI units is the set of units used to maintain uniformity all over the world.
Answer:
(b) Both A and R are true but R is not the correct explanation of A.
Quiz Time :
Question 1.
Express the height of a person ( 1.65 metres) in centimetres and millimetres.
Answer:
Height in centimetres: 1.65 metres × 100 – 165 centimetres.
Height in millimetres: 1.65 meters × 1000 =1650 millimetres.
Question 2.
The distance between Radha’s home and her school is 3250 metres. Express this distance in kilometres.
Answer:
The distance is 3.25 kilometres (since 1 kilometre =1000 metres).
Question 3.
What is the SI unit of length?
Answer:
The SI unit of length is metre (m).
Question 4.
Given below are the lengths. Arrange them in their decreasing magnitude.
10 cm, 10 mm, 10 km, 10 m
Answer:
10 km, 10 m, 10 cm, 10 mm
Question 5.
What is full form of SI unit?
Answer:
International System of Units.
Question 6.
How many centimetres are equivalent to 1 inch?
Answer:
2.54 cm.
Question 7.
How many millimetre (mm) a metre has?
Answer:
1000 mm
Question 8.
What is rectilinear motion?
Answer:
When an object moves along a straight line, the motion is said to be rectilinear motion.
Question 9.
Give one example of periodic motion.
Answer:
Motion of a pendulum or motion of a child on a swing.
Question 10.
What is the term for a stationary object or point used as a reference for measuring distance?
Answer:
Reference point
Self-Assessment :
Question 1.
Which type of motion is exhibited by a swinging pendulum?
(a) Linear motion
(b) Circular motion
(c) Oscillatory motion
(d) Rotational motion
Question 2.
We measure the length of a room in the unit
(a) kilometre
(b) metre
(c) both (a) and (b)
(d) milimetre
Question 3.
What do we use to measure curved lengths?
(a) Thread
(b) Wood
(c) Sand
(d) Paper
Question 4.
Assertion (A): For measuring the length (L) of an object choose a appropriate device.
Reason (R): We can measure the length (L) of a curved line directly by using a meter scale.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A .
(c) A is true but R is false.
(d) A is false but R is true.
Question 5.
Match the items in column A with those in column B.
| Column A | Column B |
| (i) Metre (m) | (a) 1000 metres |
| (ii) Centimetre (cm) | (b) 2.54 centimetres |
| (iii) Kilometre (km) | (c) 10 millimetres |
| (iv) Inch (in) | (d) Basic unit of length |
(A) (i)-(b), (ii)-(a), (iii)-(d), (iv)-(c)
(B) (i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)
(C) (i)-(d), (ii)-(b), (iii)-(c), (iv)-(a)
(D) (i)-(d), (ii)-(a), (iii)-(b), (iv)-(c)
Question 6.
Write one example of circular motion.
Question 7.
What is rectilinear motion?
Question 8.
What is the type of motion of an ant?
Question 9.
What is the type of motion of string of a guitar?
Question 10.
What is the full form of SI system?
Question 11.
Define the term rest and motion.
Question 12.
What do you mean by standard unit?
Question 13.
How will you measure the length of a curved line?
Question 14.
Write two precautions when you measure the length of a line.
Question 15.
What is the correct position of the eye while reading the scale?
Question 16.
Fill in the blanks:
(i) Motion of wheel of bicycle is _________
(ii) Motion of a child on swing is _________.
(iii) Five kilometres are _________ metre.
Question 17.
What is the difference between motion and rest?
Question 18.
Why is handspan not used to measure the length of any object?
Question 19.
Write true or false.
(a) 1 km=1000 m [ ]
(b) A flying bird in the sky is at rest. [ ]
(c) A rotating fan is an example of rotational motion.
Question 20.
Arrange the following lengths in their increasing order:
1 metre, 1 centimetre, 1 kilometre and 1 millimetre
Question 21.
Explain different types of motions with examples.
Question 22.
Write an experiment to measure the length of a line.
Question 23.
Write two examples of each of the following:
(i) Linear motion
(ii) Circular motion
(iii) Periodic motion
(iv) Oscillatory motion