8Ia

1       Another name for heat energy is:

A       kinetic energy.

B       spring energy.

C       thermal energy.

D       mechanical energy.

2       What are the units for measuring heat energy?

A       newtons

B       degrees Celsius

C       joules

D       degrees Fahrenheit

3       If you leave a cup of hot tea standing in the kitchen for a whole day, what will happen to its temperature?

A       It will stay the same.

B       It will get only a little bit cooler.

C       It will end up the same temperature as the air in the kitchen.

D       It will be colder than the air in the kitchen.

4       The amount of heat energy in an object depends on three things. Which of these things does it not depend on?

A       its mass

B       its colour

C       its temperature

D       the material it is made from

8Ib

1       Which of these materials is a good conductor of heat?

A       copper                           B       air

C       water                              D      glass

2       When one end of a piece of metal is heated:

A       the particles get closer together.

B       the particles vibrate more and the vibrations are passed from particle to particle.

C       the heat does not move through the metal.

D       the particles get bigger.

3       Solids are better conductors than liquids or gases because:

A       the particles are closer together in gases.

B       the particles are closer together in liquids.

C       the particles are closer together in solids.

D       the particles in a solid cannot move.

4       Feathers are good insulators because:

A       they are solid.

B       birds have them.

C       they trap pockets of air.

D       they are waterproof.

8Ic

1       Why do materials expand when they are heated?

A       The particles get bigger.

B       The particles move around more and take up more space.

C       The particles get closer together.

D       The particles stick together.

2       Which substances can heat travel through by convection?

A       solids and liquids             B       solids and gases

C       only liquids                     D      liquids and gases

3       Why does the cold air near the ice lolly move downwards?

A       It is colder and denser than the air near it.

B       It is warmer and denser than the air near it.

C       It is colder and less dense than the air near it.

D       It is warmer and less dense than the air near it.

4       Infrared radiation can travel through:

A       transparent objects only.

B       opaque objects only.

C       empty space only.

D       empty space and transparent objects.

8Id

1       Why do we need to save energy?

A       Fossil fuels are running out.

B       Renewable energy resources are  running out.

C       To pay for insulation.

D       Renewable energy is cheap.

2       Loft insulation is used:

A       to keep the loft warm.

B       to keep heat energy in the house.

C       to stop the roof from being covered with snow.

D       to protect the rafters.

3       Houses can lose heat energy through:

A       the walls.

B       the floors.

C       the windows.

D       all of the above.

4       Duvets and loft insulation are good insulators because:

A       they are soft.

B       they do not cost very much.

C       they last a long time.

D       they contain trapped air.

8Ie

1       When liquid water changes into steam it is:

A       condensing.                   

B       evaporating.

C       melting.                          

D       dissolving.

2       Candle wax melts at 57 °C. At what temperature does candle wax freeze?

A       0 °C                              

B       7 °C

C       57 °C                            

D       100 °C

3       What happens to the temperature of the water in a beaker when it is boiling?

A       It goes up.

B       It stays the same.

C       It goes down.

D       It all depends on how hot the water was to start with.

4       When molten wax is freezing and turning back into a solid, what happens to the temperature of the wax?

A       It goes up.

B       It stays the same.

C       It goes down.

D       It all depends on how hot the wax was to start with.