Across
- 4. fossil fuel in the solid form
- 6. removal of nutrients from the soil by rain water
- 7. outermost layer on the Earth
- 8. type of rock related to volcanic activities
- 10. the liquid rock that comes out of the volcano
Down
- 1. extraction of minerals from the soil
- 2. vent in Earth's crust
- 3. loose material on the Earth's surface
- 5. plates that move away from each other
- 9. where oil and natural gas are formed