Across
- 4. an extremely large, round mass of rock and metal, such as Earth, or of gas, such as Jupiter, that moves in a circular path around the sun or another star
- 6. a poisonous form of oxygen
- 7. all the living things in an area and the way they affect each other and the environment
- 9. the planet on which we live
Down
- 1. a clear liquid, without colour or taste
- 2. the mixture of gases around the earth
- 3. an artificial substance that can be shaped when soft into many different forms and has many different uses
- 5. damage caused to water, air, etc. by harmful substances or waste
- 8. a very large area of sea