The picture shows a coal fire burning brightly. There is also an electric fan heater plugged
into the wall. The heater is switched on and the fan is turning.
A window nearby is slightly open.
Tell me about energy in the situation
13. A fan heater is efficient because it heats the room up quickly.
true ( ) false ( ) don’t understand ( ) not sure ( )
14. Unlike force which you can feel, energy has no physical existence since it is merely an
abstract idea.
true ( ) false ( ) don’t understand ( ) not sure ( )
15. If the window is left open, the heating of the room will be less efficient.
true ( ) false ( ) don’t understand ( ) not sure ( )
16. The energy from the power station which supplied the electricity for the fan heater did
not exist before it was generated by the station.
true ( ) false ( ) don’t understand ( ) not sure ( )
17. Generating electricity for the heater can cause pollution, just as a coal fire does.
true ( ) false ( ) don’t understand ( ) not sure ( )
18. Energy from the room which goes out of the window can’t be used to do anything else.
true ( ) false ( ) don’t understand ( ) not sure ( )