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Measurement of Time and Motion — Chapter Summary

CBSE · Class 7 · Science

Summary of Measurement of Time and Motion for CBSE Class 7 Science. Part of the CBSE Class 7 Science syllabus.

102 questions74 flashcards5 formulas & key relations5 concepts

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Overview

Time is measured by regularly repeating events and by devices that repeat a steady process. A day is based on the rising and setting of the Sun. Early timekeeping used sundials, water clocks, hourglasses, and candle clocks. Later, pendulum clocks, quartz clocks, and atomic clocks gave greater accura

Key Concepts

Time was first tracked by natural

Time was first tracked by natural cycles such as the rising and setting of the Sun. Devices like sundials, water clocks, hourglasses, and candle clock

A sundial determines time from

A sundial determines time from the changing position of the shadow of an object cast by sunlight. It measures local or solar time, so a correction is

Water clocks measured time by

Water clocks measured time by the flow of water in or out of a vessel. The sinking bowl type, called Ghatika-yantra, used a bowl that filled and sank

An hourglass measured time by

An hourglass measured time by the flow of sand from one bulb to another. Candle clocks had markings that showed the passage of time as the candle burn

A pendulum is periodic because it

A pendulum is periodic because it repeats its motion after a fixed interval of time. One complete oscillation is a full to-and-fro motion. The time ta

Learning Objectives

  • Understand how time was measured before modern clocks and watches
  • Identify different ancient and modern time-measuring devices
  • Explain the idea of time period using a simple pendulum
  • Use the SI unit of time and correct symbols for time units
  • Calculate speed using distance and time

Frequently Asked Questions

What are the important topics in Measurement of Time and Motion for CBSE Class 7 Science?
Key topics in Measurement of Time and Motion include Measurement of Time, Simple Pendulum and Time Period, Units of Time and Accuracy, Speed and Related Formulae. Study these first, then practise questions on each for Class 7 exams.
How should I revise Measurement of Time and Motion for Class 7 exams?
Learn the core ideas first, then work through the 102 practice questions on Measurement of Time and Motion. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Measurement of Time and Motion

All CBSE Class 7 Science Chapter Summary

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