Across
- 1. anything that makes the Earth dirty and unhealthy.
- 5. a colourless, transparent liquid.
- 7. go down below the surface of something.
- 8. a common white substance found in the sea.
- 9. to combine different substances.
- 10. the layer of Earth in which plants grow.
- 12. rest or move on or near the surface of a liquid without sinking. .
- 14. frozen water.
- 15. water vapour.
- 17. natural, not salty water.
- 18. no smell.
Down
- 2. a large area of sea.
- 3. Earth's outer layer.
- 4. nickname of Metamorphic rocks.
- 6. the home of animal that live in the ground.
- 11. the solid mineral material forming part of the surface of the Earth.
- 12. nickname of Igneous rocks formed from lava.
- 13. nickname of Sedimentary rocks with layers.
- 16. no taste.
- 18. black natural substance used in vehicles.