#### T2 - Heat and Temperature

7th Standard

Reg.No. :
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Science

Time : 01:00:00 Hrs
Total Marks : 60

Part - A

3 x 1 = 3
1. International unit of measuring temperature is __________

(a)

Kelvin

(b)

Fahrenheit

(c)

Celsius

(d)

Joule

2. In thermometer when bulb comes in contact with hot object, liquid inside it

(a)

expands

(b)

contracts

(c)

remains same

(d)

none of above

3. The body temperature of a healthy man is;

(a)

00C

(b)

370C

(c)

980C

(d)

1000C

4. Fill in the blanks

3 x 1 = 3
5. Doctor uses _____________ thermometer to measure the human body temperature.

()

Clinical

6. At room temperature Mercury is in _______________ state.

()

Liquid

7. Heat energy transfer from _______________ to ___________

()

hot and cold

8. Part - B

3 x 2 = 6
9. Temperature of Srinagar (J&K) is — 40C and in Kodaikanal is 30C which of them has greater temperature? What is the difference between the temperatures of these two places?

10. Jyothi was prepared to measure the temperature of hot water with a clinical thermometer. Is it right or wrong? Why?

11. A clinical thermometer is not used to measure the temperature of air, why?

12. Part - C

2 x 3 = 6
13. Why do we use Mercury in thermometers?Can water be used instead of mercury?What are the problems in using it?

14. Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Ramani said it was a wrong way of measuring temperature. Do you agree with Ramani? Explain your answer.

15. Part - D

2 x 5 = 10
16. Draw the diagram of a clinical thermometer and label its parts.

17. State the similarities and differences between the laboratory thermometer and the clinical thermometer.