Fill in the blanks
1. The ……………… by an object in a given interval of time can helps to decide whether it is faster or slower.
2. ……………… of an object can be defined as the distance travelled by it in a unit time.
3. Present chairman of iSRO ……………… .
4. ……………… are the devices that produce force or push to move an object forward into the space.
5. The movement of rocket is in a ……………… motion.
6. The movement of artificial satellites is in ……………… motion.
7. An object is said to be in ……………… if it changes its position with respect to its surroundings.
8. An object is said to be at ……………… if there is no change in its position with respect to its surroundings.
9. ……………… makes an object to move or tendio move.
10. The total length of the path travelled by an object between two places is called ……………… .
11. The basic unit of distance is
12. S.I units of distance is ……………… .
13. The length of the straight-line path which is the shortest distance between two places is called ……………… .
14. The measurable period between two incidents is called ……………… .
15. The basic unit’of time is ……………… .
16. 1 minute = ……………… seconds
17. 10 years : 1 ………………
18. ……………… are the most common time measuring devices.
19. ……………… are used to measure shorter time intervals between two events accurately.
20. The time between one new moon to the next is ……………… .
