Energy
Across
- 2. something we should all try to save
- 5. our main source of energy
- 6. a fossil fuel made from plants and trees
- 9. the posh word for rain, snow, hail and sleet
- 14. the number of people who live in a town, country etc
- 15. something that can be burnt to give energy
- 17. the number of years it took for fossil fuels to form
Down
- 1. when a gas turns back into a liquid
- 2. when a liquid turns into a gas
- 3. a fossil fuel made from sea creatures
- 4. a fossil fuel made from sea creatures
- 7. a gas which forms a protective layer around the earth
- 8. the weather you would expect in a particular place
- 10. everything in our surroundings
- 11. a thick layer of gases which surrounds the earth
- 12. buildings where goods are made by machines
- 13. harmful waste or dirt in the air and water
- 16. to do with the sun