7th science chapter 9 test

Fill in the blanks.

1. Equal distance in equal interval of time is called.........

2. 1 century is equal to .......years.

3. Distance travelled by a body in unit time is called its...........

4. The Sl unit of time is..........

5  The Si unit of speed is

a. km/hr

b. cm/s

c. m/min

d. m/s

6.  A car moves on a highway with different speeds at different times. Its motion will be

a. uniform

b. non-uniform

c. periodic

d. none of these

7  A boy sitting in a moving car is in motion with respect to

a. a tree on the road side

b. his fellow passenger

c. both a. and b.

d. neither a. nor b.

8. A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h the next 15 minutes. The total distance covered by the car is: 

a. 100 km

b. 25 km

c. 15 km

d. 10 km

9. Which of the following is not a type of motion?

a. Rectilinear motion

b. Circular motion

c. Oscillatory motion

d. Stationary motion

10  'T' for true and 'F' for false.

1. A sun dial gives most accurate time.

2. Motion of the Earth round the Sun is a non-uniform motion.

3. Motion of a pendulum is a periodic motion.

4. In a graph, the independent variable is plotted on X- axis.

11

1. To compare slow and fast motions.......... needs to be measured.

2. Speed can be calculated from ...........of a distance time graph.

3. When a body covers equal distance in equal intervals of time, its motion is called.........

12 Define the following in one sentence.

1. Speed

2. Uniform motion

3. Time period of a pendulum

4. Slope of a graph

13 . one word for the following:

1. time taken by a pendulum to complete one oscillation

2. equal distance covered in equal intervals of time

14. Answer the following in one sentence.

1. Name the axes of a graph.

2 Give two examples of uniform motion.

3. Give two examples of non-uniform motion.

4. Which type of motion is shown by a pendulum?

14. Answer the following questions in batt

A car was moving at a speed of 50km/h Calculate the distance covered by car in  15 sec.

15 Answer the following in detali

2. Explain difference between uniform and non-uniform motion with examples