Across
- 3. a type of soil that becomes hard when baked
- 7. rocks are made out of this
- 8. another name for mud
- 10. melted rock underground
- 11. strongest type of stone
- 13. rock made from small particles
- 14. melted and reformed rock
- 15. a cooled rock from a volcano
Down
- 1. a large stone or boulder
- 2. layer of soil made from decaying plants and animals
- 4. bottom layer of earth
- 5. remains that have become hardened
- 6. used to make roofs
- 9. magma when it leaves the volcano
- 10. to make something liquid by heating
- 12. rain, frost and wind