8I Quick Quiz


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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.