#### Measurement and Measuring Instruments Important Questions

9th Standard

Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. Choose the correct one

(a)

mm< cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m> cm> km

2. Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

3. Density is_________

(a)

$\frac{volume}{mass}$

(b)

$\frac{mass}{volume}$

(c)

$\frac{area}{volume}$

(d)

$\frac{volume}{area}$

4. Unit of acceleration is________.

(a)

ms-2

(b)

ms-1

(c)

$\frac{m}{s}$

(d)

$\frac{s}{m}$

5. Light year is the distance travelled by light________.

(a)

one year

(b)

two years

(c)

10 years

(d)

5 years

6. 5 x 1 = 5
7. Metre is the unit of ________

()

length

8. 1 kg of rice is weighed by ______

()

beam balance

9. The SI unit of volume is________.

()

Cubic metre

10. Least count of screw gauge__________.

()

0.01 mm

11. Least count of Vernier caliper is___________.

()

0.01 cm

12. 5 x 2 = 10
13. Define measurement

14. Define standard unit.

15. What is the full form of SI system?

16. In which part of the Vernier caliper is used to measure the internal diameter of a cylindrical pipe?

17. Define length.

18. 5 x 3 = 15
19. Write the rules that are followed in writing the symbols of units in SI system.

20. Write the need of a standard unit

21. What are the fundamental physical quantities and their units?

22. Name some derived quantities. Write. their units.

23. The mass of an object is 5 kg. What is its weight on the earth?

24. 3 x 5 = 15
25. How will you find the thickness of a one rupee coin?

26. Explain the method to find the diameter of the sphere.

27. Find the diameter of a thin wire using screw gauge.