1.

A bowl of water on a gas stove was initially cold. It became warm after sometime.

What was the mode of heat transfer in the water?

2.

Heat from the sun by

I. Conduction
II. Convention
III. Radiation

3.

Which of the following objects is a good conductor of heat?

4.

The best reason why a cooking pan should have a wooden handle is that, wood is a

5.

Heat from the sun reaches the earth by

6.

By what process is heat transferred from the bottom of a beaker containing water to the top?

7.

Liquids suitable for use in thermometers must not:

8.

9.

A temperature controlling device which works using the principles of expansion and contraction is called a

10.

Plastic materials may be used to make the handles of cooking utensils because they are

11.

The heat of the sun reaches the earth through

12.

The temperature of 20^oC on the kelvin scale is

13.

The transfer of heat through a solid medium is by

I. conduction
II. convection
III. radiation

14.

The gaps left between railway lines is to allow for

15.

Which of the following statements is true at the boiling point of water?

16.

Gaps are left between railway lines to

17.

When a thermometer is put in hot water, the mercury level rises because the mercury increases in

18.

The modes of heat transfer involved in the process of heating water in a bucket, from the bottom until it boils are

19.

A metal expands when there is

20.

Wood is used to make the handles of cooking utensils because it is

21.

Ventilation holes are made at the upper part of a door to allow air to rise by

22.

The process by which heat travels along a metal is called

23.

The instrument used to measure temperature is the

24.

Heat travels through vacuum by

25.

Heat is transferred from the bottom of water in a container to the top by

26.

A mercury thermometer works on the principle that

27.

The type of liquid suitable to construct a thermometer to read temperatures of about 150^oC is

28.

Which of the following properties of alcohol as a thermometric liquid is correct?

29.

Which of the following modes of heat transfer is the thermos flask designed to minimize?

I. Conduction
II. Convection
III. Radiation

30.

A good thermometer liquid must

31.

The reason why gaps are left in the joints of railway lines is to allow for

32.

The transfer of heat from the bottom to the top of a beaker containing water is by

33.

A metal that is used as a thermometric liquid is

34.

The form of energy which flows from one point to another due to temperature differences is known as

35.

Heat is transferred along an iron bar by

36.

When a thermometer is put in hot water, the mercury level rises because the mercury increases in

37.

The mode of heat transfer in which no material is involved is known as