1Stored water at a dam, the sun, a petrol pump, a solar panel and burning coal: which forms of energy is each of these connected with?
2Is it possible to do every job of daily life with one single form of energy?
3What are the sources of the different kinds of energy we obtain?
4How is heat seen to spread in a burning wood fire and in the warm air of a valley?
5Is the process by which heat travels the same in all materials?
6The fire burns only under the pot, so why does the handle of the pot also become hot after a while?
7Why does hot water feel hot and ice feel cold when we touch them? Answer by saying which way the heat moves.
8Write the difference between energy and a source of energy, with an example.
9A cup of hot tea becomes cold after a while. Explain this using the rule about heat.