Heat and Temperature

Samacheer Book Back Questions And Answers For Science Standard 7 Term 2 “Heat and Temperature“

I. Choose the correct answer:
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) 0°C
(b) 37°C
(c) 98°C
(d) 100°C

4. Mercury is often used in laboratory thermometers because it
(a) Is a harmless liquid
(b) Is silvery in colour and is attractive in appearance
(c) Expands uniformly
(d) Is a low-cost liquid

5. Which of the following temperature conversions is incorrect
K (Kelvin) = °C (Celsius) + 273.15
°C            K
(a) -273.15        0
(b) -123.           +150.15
(c) + 127.         + 400.15
(d) + 450         + 733.15

II. Fill In the blanks:
1. Doctor uses _____thermometer to measure the human body temperature.
2. At room temperature mercury is in _____ state.
3. Heat energy transfer from _____to _____.
4. -7°C temperature is _____than 0°C temperature.
5. The common laboratory thermometer is a _____ thermometer.

Answers:
1. Clinical
2. Liquid
3. Hotter Object, Colder Object
4. Less
5. Mercury

III. Match the following:
1. Clinical thermometer                                  A. A form of energy
2. Normal temperature of human body         B. 100°C
3. Heat                                                            C. 37°C
4. Boiling point of water                                 D. 0°c
5. Melting point of water                                E. Kink

Answers:
1. E
2. C
3. A
4. B
5. D

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