EASY
7th CBSE
IMPORTANT
Earn 100

Name three instruments used to measure time.

Important Questions on Time and Motion

MEDIUM
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q D
Explain the use of periodic motion to measure time.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q D
Name two units of time larger than a day.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q D
Name one clock that uses the movement of the sun to keep time.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q D
What is speed? Give its SI unit.
MEDIUM
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q E
A vehicle travels 25 km in 15 minutes. Calculate its speed in kmhr.
MEDIUM
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q E
A commercial aircraft travels at 900 km hr-1. Calculate the distance it travels in 5 hours.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q E
Seismic waves (earthquake waves) travel at about 8 kms on the Earth’s crust. Calculate the distance it travels in 10 s.
EASY
7th CBSE
IMPORTANT
Science Horizons>Chapter 12 - Time and Motion>Exercises>Q E
Convert 30 s to minutes.