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class 7 science heat

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

______________ is the mode of heat transfer in liquids and gases

a)

Conduction

b)

Radiation

c)

Convection

2.

which mode of heat transfer is this?

a)

conduction

b)

convection

c)

radiation

3.

which thermometer is used to measure temperature of an object?

a)

clinical thermometer

b)

laboratory thermometer

c)

maximum minimum thermometer

4.
Heat moves by ______ when it travels from one solid to another solid.
a)
radiation
b)
convection
c)
thermal energy
d)
conduction
5.
Heat 
a)
Moves from hot to cold
b)
Moves from cold to hot
c)
Always rises up
d)
It depends on the molecules
6.

If you dropped a hot rock in a bucket of cold water the rock will

a)

Stay the same temperature

b)

become cooler

c)

become hooter

d)

Melt

7.

When we hold our hand close to the side of a flame , they get warmed up mainly due to

a)

Conduction as well as convection

b)

Conduction

c)

Convection

d)

Radiation

e)

Heat

8.

Insulators of heat is

a)

Rubber

b)

Wood

c)

Plastic

d)

Graphite

e)

Metal

9.

The reading of the laboratory thermometer , in the figure shown here , is -

a)

19

b)

18

c)

17

d)

19.5

e)

18.5

10.

Water is ---------------- conductor of heat

a)

Bad

b)

Good

c)

Temperature

d)

Radiation

e)

Degree

11.

Which mode of heat transfer is this

a)

Convection

b)

Conduction

c)

Radiation

12.

What is normal temperature in digital thermometer

a)

98.7 degree

b)

99.9 degree

c)

98.6 degree

d)

100.1 degree

e)

97.6 degree

13.

Which of the following thermometer is to check whether

a)

Temperature thermometer

b)

Maximum - Minimum thermometer

c)

laboratory thermometer

d)

Digital thermometer

e)

Mercury thermometer

14.

Fahrenheit scale ranges from

a)

94 degree to 108 degree

b)

94 degree to 106 degree

c)

94 degree to 102 degree

d)

94 degree to 105 degree

e)

92 degree to 108 degree

15.

Where does the initial source of energy come from that creates wind

a)

Sun

b)

Moon

c)

Mars

d)

Mercury

e)

Venus

16.

Which thermometer is used to measure temperature of object

a)

Digital thermometer

b)

Mercury thermometer

c)

Laboratory thermometer

17.

------------ is the mode of heat transfer in liquid and gases

a)

Radiation

b)

Convection

c)

Conduction

18.

Is 38 Celsius is normal temperature of human body

a)

True

b)

False

19.

Air is poor conductor of heat

a)

Yes

b)

No

20.

Temperature is measured by device called

(a)