Across
- 4. a type of heavy, sticky earth that becomes hard when it is baked and is used to make things such as pots and bricks
- 6. a naturally occurring solid with a regular structure
- 7. changed from a solid to a liquid state because of heating
- 8. formed from compressed layers of sand, mud and pebbles
- 9. a substance made from dead leaves and plants, added to soil to help plants grow
- 12. sand, mud, etc. that is carried by flowing water and is left at the mouth of a river
- 13. formed from melted rock
- 14. a quantity or thickness of sth that lies over a surface or between surfaces
Down
- 1. formed by heat and pressure
- 2. a basic substance that cannot be broken down simply
- 3. a smooth, round stone that is found in or near water
- 5. to become firm or stiff
- 8. a type of solid, liquid or gas that has particular qualities
- 10. hard or firm; not in the form of a liquid or gas
- 11. the solid outer layer of the Earth