Across
- 2. used as a growing medium
- 4. composed of one or more materials
- 5. splitting along a smooth flat planes
- 8. the building block of minerals
- 9. the process of eroding
Down
- 1. undegone by pressureand heat
- 3. rock formed under the earths crust
- 6. an opening in earths crust
- 7. a fertile soil of clay