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#### Measurement and Measuring Instruments Book Back Questions

9th Standard

Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 35
4 x 1 = 4
1. Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

2. 1 metric ton is equal to

(a)

100 quintals

(b)

10 quintals

(c)

1/10 quintals

(d)

1/100 quintals

3. Distance between Chennai and Kanyakumari can be found in

(a)

Kilometres

(b)

Metres

(c)

Centimetres

(d)

Millimetres

4. Which among the following is not a device to measure mass

(a)

Spring balance

(b)

Beam balance

(c)

Physical balance

(d)

Digital balance

5. 3 x 1 = 3
6. The thickness of a cricket ball is measured by _______

()

Vernier Caliper

7. The radius of a thin wire is measured by ________

()

Screw gauge

8. A physical balance measures small differences in mass up to ______

()

1 milligram

9. 3 x 1 = 3
10. In everyday life, we use the term weight instead of mass.

(a) True
(b) False
11. A physical balance is more sensitive than a beam balance as it can accurately measure even a very small mass, even milligram

(a) True
(b) False
12. One Celsius degree is an interval of 1K and zero degree Celsius is 273.15 K

(a) True
(b) False
13. 5 x 1 = 5
14. Digital balance

15. (1)

Digital Clock

16. Temperature

17. (2)

Gold ornaments

18. Mass

19. (3)

Ruler

20. Length

21. (4)

Thermometre

22. Time

23. (5)

Beam balance

3 x 2 = 6
24. What is the full form of SI system?

25. What do you know about pitch of screw gauge?

26. Convert : 104°F in to Celsius scale.

27. 3 x 3 = 9
28. Write the need of a standard unit

29. What is the measuring unit of the thickness of a plastic carry bag?

30. How will you measure the least count of vernier caliper ?

31. 1 x 5 = 5
32. Inian and Ezhilan argue about the light year. Inian tells that it is 9.46 × 1015 m and Ezhilan argues that it is 9.46 × 1012 km. Who is right? Justify your answer.