NCERT Class 7 Science MCQ | Chapter 8: Measurement of Time and Motion
1. What is motion?
(A) Change in the position of an object with time
(B) Change in the colour of an object
(C) Change in the shape of an object only
(D) Change in the temperature of an object only
Answer: (A) Change in the position of an object with time
2. Which of the following is an example of a moving object?
(A) A parked car
(B) A flying bird
(C) A book kept on a table
(D) A stationary tree
Answer: (B) A flying bird
3. What is used to measure time?
(A) Clock
(B) Thermometer
(C) Balance
(D) Measuring cylinder
Answer: (A) Clock
4. What is the SI unit of time?
(A) Minute
(B) Hour
(C) Second
(D) Day
Answer: (C) Second
5. Which instrument is commonly used to measure short intervals of time accurately?
(A) Stopwatch
(B) Thermometer
(C) Barometer
(D) Spring balance
Answer: (A) Stopwatch
6. What does a clock measure?
(A) Time interval
(B) Mass
(C) Temperature
(D) Length
Answer: (A) Time interval
7. One minute is equal to:
(A) 10 seconds
(B) 30 seconds
(C) 60 seconds
(D) 100 seconds
Answer: (C) 60 seconds
8. One hour is equal to:
(A) 60 minutes
(B) 30 minutes
(C) 100 minutes
(D) 24 minutes
Answer: (A) 60 minutes
9. Which of the following is a periodic motion?
(A) Motion of a swinging pendulum
(B) Motion of a car in traffic
(C) Motion of a person walking randomly
(D) Motion of a stone rolling on an uneven surface
Answer: (A) Motion of a swinging pendulum
10. What is periodic motion?
(A) Motion that repeats itself at regular intervals of time
(B) Motion that never changes
(C) Motion that occurs only once
(D) Motion that has no definite pattern
Answer: (A) Motion that repeats itself at regular intervals of time
11. Which of the following is an example of periodic motion?
(A) Revolution of the Earth around the Sun
(B) A car moving randomly on a road
(C) A person changing direction while walking
(D) A falling stone
Answer: (A) Revolution of the Earth around the Sun
12. What is the time taken by a pendulum to complete one oscillation called?
(A) Time period
(B) Speed
(C) Distance
(D) Amplitude
Answer: (A) Time period
13. What is one complete to-and-fro motion of a pendulum called?
(A) One oscillation
(B) One rotation
(C) One revolution
(D) One displacement
Answer: (A) One oscillation
14. Which factor is important in determining the time period of a simple pendulum?
(A) Length of the pendulum
(B) Colour of the bob
(C) Material of the stand
(D) Shape of the room
Answer: (A) Length of the pendulum
15. If the length of a simple pendulum is increased, its time period generally:
(A) Increases
(B) Decreases
(C) Becomes zero
(D) Remains exactly the same
Answer: (A) Increases
16. What is speed?
(A) Distance travelled per unit time
(B) Time taken to travel a distance
(C) Distance travelled without considering time
(D) Change in temperature per unit time
Answer: (A) Distance travelled per unit time
17. What is the SI unit of speed?
(A) Metre
(B) Second
(C) Metre per second
(D) Kilometre
Answer: (C) Metre per second
18. Which formula is used to calculate speed?
(A) Speed = Distance ÷ Time
(B) Speed = Time ÷ Distance
(C) Speed = Distance × Time
(D) Speed = Distance + Time
Answer: (A) Speed = Distance ÷ Time
19. A cyclist travels 100 metres in 20 seconds. What is the cyclist’s speed?
(A) 2 m/s
(B) 5 m/s
(C) 20 m/s
(D) 100 m/s
Answer: (B) 5 m/s
20. A faster-moving object covers:
(A) More distance in the same amount of time
(B) Less distance in the same amount of time
(C) No distance
(D) The same distance in every situation
Answer: (A) More distance in the same amount of time
21. Which of the following is an example of rotational motion?
(A) Rotation of a ceiling fan
(B) A person walking straight
(C) A stone falling from a height
(D) A car moving on a straight road
Answer: (A) Rotation of a ceiling fan
22. Which of the following is an example of rectilinear motion?
(A) A train moving along a straight track
(B) A rotating fan
(C) The hands of a clock rotating around a fixed point
(D) A spinning top
Answer: (A) A train moving along a straight track
23. Why is a standard unit of time necessary?
(A) To make measurements comparable and consistent
(B) To make clocks run faster
(C) To increase the duration of a day
(D) To change the speed of objects
Answer: (A) To make measurements comparable and consistent
24. A car travels 150 km in 3 hours. What is its average speed?
(A) 30 km/h
(B) 40 km/h
(C) 50 km/h
(D) 60 km/h
Answer: (C) 50 km/h
25. Which statement correctly describes the relationship between distance, time and speed?
(A) Speed tells us how much distance is covered in a given time
(B) Speed is equal to time divided by distance
(C) Speed does not depend on distance or time
(D) Speed can be measured only using a clock
Answer: (A) Speed tells us how much distance is covered in a given time
