Motion and Time Class 7 Worksheet Science Chapter 9

Q.1. True/False
(i) The basic unit of time is second.
(ii) Every object moves with a constant speed.
(iii) Distances between two cities are measured in kilometres.
(iv) The time period of a given pendulum is not constant.
(v) The speed of a train is expressed in m/h.
(vi) Clocks that measure such small time intervals are used for scientific research.

Q.2. Fill in the blanks.
(i)  The metallic ball is called the ____ of the pendulum.
(ii) The symbols of all units are written in ____.
(iii) The time taken by the pendulum to complete one oscillation is called its ____.
(iv) One microsecond is one ____ of a second.
(v) A nanosecond is one ____ of a second.
(vi) The distance-time graph for the motion of an object moving with a constant speed is a ____.

Q.3. Give an example of oscillatory motion.

Q.4. What is uniform motion?

Q.5. An object moving along a straight line with a constant speed is said to be in uniform motion.Q.6. Write down the steps to draw a graph.

Q.7. What is distance-time graph?

Q.8. What is oscillatory motion?

Q.9. What is circular motion?

Q.10. What is non-uniform motion?

Q.11. What is the basic unit of speed?

Q.12.  A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?

Q.13. When pendulum is said to have one complete oscillation?

Q.14. What are the points that should be considered while choosing the most suitable scale for drawing a graph?

Q.15. Explain how in ancient time a day, a month and a year were measured?

Q.16. The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.

Q.17. Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.

Q.18. What is the basic unit of time?

Q.19. What is speedometer?

Q.20. What are quartz clocks?

You can find Worksheets Solutions here: Worksheet Solutions: Motion and Time