1. _______ It’s a clean source of energy. Sailboats couldn’t move without this power.
2. _______ It can be found in only some places of the earth. It comes from depth inside the earth.
3. _______ This energy can be dangerous. It was used to make bombs in World War II.
4. _______ They will be run out within a relatively short time. The first letters of the words are both
“f”.
5. _______ We can make this energy almost every day. Panels are used to create this energy.
6. _______ When it moves from a high place to a lower place, it makes energy. This energy is used to create electricity.
1 wind
2 Petroleum
3 nuclear
4 fire?
5 solar energy
6 water
