Motion and Time - Worksheets
CBSE Worksheet-01
Class – VII Science (Motion and Time)
- The change in position of an object with respect to the surroundings is called
- Force
- Motion
- Momentum
- Movement
- The earliest clocks for measuring time during day were
- Sand clocks
- Pendulum clocks
- Sundials
- Stop watches
- An athlete covers 300 m in 5 seconds .What is his average speed ?
- 30 m/s
- 60 m/s
- 50 m/s
- 75 m/s
- S.I unit of speed is
- m/s
- km/h
- m/h
- km/s
- Match the following :-
Column A Column B (a) One decade (i) 100 years (b) One millennium (ii) 1000 m (c) One kilometer (iii) 1000 years (d) One hour (iv) 10 years (e) A century (v) 3600 seconds - Fill in the blanks with suitable words.
- Distance travelled by a body in unit time is called ________.
- 72 km/h is equal to _______m/s.
- A complete to and fro movement of the pendulum is called _________.
- A mineral used in the crystal form in watch is _______.
- A body is said to be in _________ if it covers equal distance in equal interval of time.
- What is a simple pendulum ?
- What is odometer ? What is its function ?
- Define motion. Write difference between uniform and non- uniform motion ?
- Give one word for the following :-
- An instrument fitted in vehicle to measure the speed.
- The time taken by a pendulum to complete one oscillation.
- S.I. unit of time.
- The Dutch scientist who made the pendulum clock.
- Watch used to measure exact time taken during the event.
CBSE Worksheet-01
Class – VII Science (Motion and Time)
Answer key
- (b)
- (c)
- (b)
- (a)
- (a) – (iv), (b) – (iii), (c) – (ii), (d) – (v), (e) – (i).
- (a) Speed (b) 20 (c) An Oscillation (d) Quartz (e) Uniform motion.
- A simple pendulum is a small mass hung from a fixed point such that it can swing freely under the influence of gravity.Most simple pendulums consist of a small metallic ball called a bob hung on a string or wire.
- Odometer is a device that records total distance covered by the vehicle. It is used to calculate the distance travelled in a particular journey.
- The change in position of a body with time is called motion.When a body covers equal distance in equal interval of time the motion is called uniform motion. When a body covers unequal distance in equal interval of time, the speed is called non- uniform motion.
- Speedometer
- time-period
- second
- Huygens in 1656
- Stop watch.