Across
- 1. a nonliving material made of one or more minerals
- 3. a mixture of minerals, weathered rocks, and other things
- 7. a great area of land on Earth
- 9. melted rock beneath Earth's surface
- 11. land features on Earth
- 13. bits of decayed plants or animals
- 14. the hot layer below the crust
- 16. the wearing away an movement of weathered rock
- 17. rock that forms from layers of sediment
- 19. rock that has been changed by heating or squeezing
- 20. a mountain that builds up around an opening in Earth's crust
- 22. the dropping off of weathered rock
- 25. the breaking down of rocks into smaller pieces
- 26. to use resources wisely
- 27. the trace, or remains, of something that lived long ago
- 29. tiny bits of weathered rock or once-living animals or plants
Down
- 2. a large body of salt water
- 4. melted rock that flows onto land
- 5. water that is held in rocks below the ground
- 6. a material on Earth that is necessary or useful to people
- 8. a sudden movement of the rocks that make up Earth's crust
- 10. the deepest and hottest layer of Earth
- 12. water that flows over land that is usually dry
- 15. rock that forms when melted rock cools and hardens
- 18. a mass of ice that moves slowly across the land
- 21. the rapid movement of rocks and soil down a hill
- 23. what happens when harmful things get into water, air, and land
- 24. a material that is burned for its energy
- 26. the outer layer of Earth
- 28. a solid, nonliving substance found in nature