Across
- 3. a naturally formed solid made of grains of one or more minerals
- 4. soil with very, very tiny grains of rock
- 5. rock that has been changed by heat or pressure
- 8. the movement of weathered rock and soil
- 10. rock that made when materials settled into layers and get squeezed until they harden into rock
- 11. the part of soil made up of broken-down pieces of dead plants and animals
Down
- 1. the breaking down of rocks into smaller pieces
- 2. soil that is a mixture of humus, sand, silt and clay
- 6. a solid object found in nature that has never been alive
- 7. rock that was once melted and then cooled and hardened
- 9. soil with grains of rock that are too small to be seen with your eyes
- 10. soil with grains of rock that you can see with your eyes
- 11. the measure of how difficult it is for a mineral to be scratched