Across
- 2. form when the ground falls into a cave below
- 3. a resource that people WILL NOT run out of
- 4. huge bodies of ice that flow slowly over the Earth's surface
- 6. the process in which sediment is moved over Earth's surface
- 8. loose material made of sediment, the remains of organisms, water, air, and living things
- 9. area of land that sticks out into a large body of water
- 11. area of the Earth's surface that is lower than the land around it
- 12. sand, mud, clay, and gravel are examples of this
- 14. a resource that people CAN run out of such as coal, oil, natural gas, and metals
Down
- 1. mountains get smaller over time due to these two things
- 5. coal, oil, and natural gas that formed over millions of years from the remains of plants and animals
- 7. materials from the environment that people use to meet their needs
- 10. the process in which rocks are broken down into smaller pieces
- 13. when materials are reused to make other products