Measurement of Time and Motion (Class 7 Science)

This chapter introduces how time and motion are measured, covering units of time, the concept of speed, and the use of simple graphs to represent and interpret motion. Students learn to read distance-time graphs and perf…

• Time is measured by counting repetitions of a periodic event.
• The SI unit of time is the second (s).
• 1 minute = 60 s; 1 hour = 3600 s; 1 day = 86 400 s.

Full explanation, worked examples & memory tricks in the app