Complete the following sentences by selecting the correct word from the list.
Enter the number that is next to word that you choose in the spaces provided.
The water in a kettle is heated mainly by
The air in a room is heated mainly by
Heat energy from the sun reaches us by a process called
Heat energy is transmitted through the walls and windows of our homes mainly by
Double glazing and loft insulation reduce the rate at which heat is lost from the home by