Class 7 Science Chapter 8: Measurement of Time and Motion — practice questions with answers
Free practice for Class 7 Science, Chapter 8: Measurement of Time and Motion. Try the solved questions below, then take a free test with instant marking and explanations.
30 questions14 easy, 11 medium, 5 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. Why did early humans use the rising and setting of the Sun and the phases of the Moon for timekeeping?
- These events repeat after definite intervals
- They are colourful
- They happen randomly
- They are very rare
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Answer: A. These events repeat after definite intervals
Why: Many natural events repeat at definite intervals and were used to keep time. [p.106]
Why: Many natural events repeat at definite intervals and were used to keep time. [p.106]
Q2. Which devices were used in the past to measure intervals of time within a day? (Tick all that apply)
- Sundials
- Water clocks
- Hourglasses
- Speedometers
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Answer: A. Sundials; B. Water clocks; C. Hourglasses
Why: Sundials, water clocks, hourglasses and candle clocks were used. [p.106]
Why: Sundials, water clocks, hourglasses and candle clocks were used. [p.106]
Q3. The position of a pendulum bob at rest is called its ______.
- mean position
- extreme position
- time period
- oscillation
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Answer: A. mean position
Why: At rest the bob is at its mean position. [p.109]
Why: At rest the bob is at its mean position. [p.109]
Q4. Why is the motion of a pendulum called periodic?
- It repeats its path after a fixed interval of time
- It stops quickly
- It moves in a straight line
- It never repeats
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Answer: A. It repeats its path after a fixed interval of time
Why: A pendulum oscillates and repeats its path at fixed intervals. [p.109]
Why: A pendulum oscillates and repeats its path at fixed intervals. [p.109]
Q5. The time taken by a pendulum to complete one oscillation is called its time ______.
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Answer: period
Why: This is the time period. [p.110, p.118]
Why: This is the time period. [p.110, p.118]
Q6. A pendulum takes 20 seconds for 10 oscillations. What is its time period (s)?
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Answer: 2 (± 0.01)
Why: 20 ÷ 10 = 2 s. [p.110]
Why: 20 ÷ 10 = 2 s. [p.110]
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Frequently asked questions
How many practice questions are there for Class 7 Science Chapter 8: Measurement of Time and Motion?
30 questions (14 easy, 11 medium, 5 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 7 Science syllabus, used by CBSE and many state boards.