Across
- 2. Rock changed by heat and pressure
- 4. Harmful substances in the air, water, or land
- 7. Looking for places with useful minerals or rocks
- 8. Pull together
- 9. Gluing sediments together by minerals
- 13. Flow of electrons in a circuit
- 15. Rock made from layers of sediment pressed together
- 18. Movement of broken rock from one place to another
- 19. Push away
- 20. Separating useful materials from the rock
- 21. Natural home of a plant or animal
- 22. Pressing sediments together to form solid rock
Down
- 1. Breaking down of rocks into smaller pieces by wind, water, or ice
- 3. Tool used to measure voltage
- 5. Device that provides DC electricity for a circuit
- 6. Circuit with more than one path for current
- 8. Current where electrons change direction
- 10. Rock formed when molten magma or lava cools and hardens
- 11. Preserved remains or evidence of ancient plants or animals
- 12. Current where electrons move one way
- 14. Removing rocks or minerals from the ground
- 16. Restoring land after mining
- 17. Circuit with one single loop for the current