Across
- 6. sand
- 8. solar, wind, geothermal, biofuels
- 9. rock made from layers of sediment
- 10. sediment left in one place after erosion
- 11. takes millions of years to make
- 14. made from plants
Down
- 1. pressure on many layers of sediment
- 2. breaking down of racks by wind, water and ice
- 3. to make lie cement or concrete
- 4. heat energy from the Earth
- 5. fossil fuel mostly made from animals
- 7. the movement of sediment by wind, water, and ice
- 12. invisible fossil fuel
- 13. fossil fuel mostly made from plants