Making use of energy test questions - WJEC - GCSE Physics (Single Science) Revision

1

In what does conduction mainly occur?

Solids

Liquids

Gases

2

A wooden block has the following dimensions:

Length: 15 cm

Height: 10 cm

Width: 10 cm

It has a mass of 200 g.

What is its density?

0.13 g/cm³

0.13 kg/m³

7.5 g/cm³

3

Which method of heat transfer does not involve particles?

Convection

Conduction

Radiation

4

Which surfaces best absorb infrared radiation?

White, dull surfaces

Black, shiny surfaces

Black, dull surfaces

5

Which surfaces best emit infrared radiation?

Black

Red

White

6

What method of heat transfer explains why hot air balloons rise?

Radiation

Conduction

Convection

7

Why does cavity wall insulation contain pockets of trapped air?

Air is a good radiator

Air is a good conductor

Air is a good insulator

8

How does heat pass through a single pane of window glass?

By conduction and convection

By conduction and radiation

By convection and radiation

9

This diagram shows a dye in a tube of water. The water is heated at the bottom right hand corner. In which direction will the dye spread?

Diagram showing a rectangular glass tube full of water. There is a heat source under the bottom right corner of the tube. There is purple dye in the water in the bottom right corner of the tube.

Clockwise

Anticlockwise

Both directions

10

Double glazing costs £4,000 to install. It saves £200 a year in fuel costs. What is its payback time?

20 years

20 days

20 weeks