Heat Energy Worksheet-8

Heat Energy Worksheet-8

1. In summer, people wear white clothes because white clothes are :

(a) good reflectors of heat

(b) good absorbers of heat

(c) poor absorbers of heat

(d) Good reflector or poor absorbers of heat

2. While laying electric wires for transmission during winter the wires are fixed :

(a) very tightly

(b) slightly loose

(c) no effect of tight or loose wires

(d) none of these

3. When boiling hot water is poured into a thick glass tumbler, it cracks because :

(a) its outer surface expands more than the inner surface

(b) its outer surface expands less than the inner surface

(c) its outer and inner surfaces expand in opposite directions

(d) none of these

4. The gaseous form of a liquid which occurs above the boiling point of a liquid is called :

(a) gas

(b) vapor

(c) gas or vapor

(d) none of these

5. The gaseous form of a liquid which occurs below the boiling point of a liquid is called :

(a) gas

(b) vapor

(c) gas or vapor

(d) none of these

Answer Key:

1. D
2. A
3. B
4. A
5. B