Energy and Forces

Study the figure carefully. What will happen to the match?

• The match will become cold.

• The match will bust into flames

• The match will melt.

• Nothing happen.

A metal rod was heated as shown in figure below. Which position on the rod would be the least hot?

• A

• B

• C

• D

The electric kettle changes electricity into _______ energy when in use.

• heat

• movement

• sound

• stored

The main source of heat energy is the ___________.

• moon

• oven

• star

• sun

Which of the following group of good conductors of heat?

• glass, mug and steel spoon

• steel spoon, iron nail and copper wire

• table cloth, iron nail and balloon

• wooden spoon, towel and brick

Which one of the following does not produce heat energy?

• Rubbing two stones together.

• Rubbing two hand together.

• fire work

• putting table cloth on the table.

Khalisah boiled some water using a metal pot as shown in the figure. Why do you think she is able to hold the pot of hot water by the handle?

• because the handle is a flexible material.

• because the handle is a good conductor of heat

• because the handle is hard material.

• because the handle is poor conductor of heat.

What type of the thermometer is shown in figure?

• Clinical thermometer

• Digital thermometer

• Data logger with heat sensor

• Wall thermometer

Which of the following statement about heat is / are correct?

1. When a light up, heat is produce

2. The main source of heat on Earth is the Sun

3. Heat has definite volume but no definite shape

• 1 only

• 2 and 3 only

• 1 and 2 only

• 1, 2 and 3

Fateh filled two identical flasks with same amount of liquids A and B respectively. He then heats two flasks in a trough of hot water as shown.

After 20 minutes, Fateh observed that the water level in each flask was different. What could be the aim of Fateh's experiment?

• To find out which liquid expands faster when heat.

• To find out which liquid expand more when heated.

• To find out which liquid cools down faster.

• To find out which liquid contracts more.