Across
- 4. to wear away
- 7. to change from a liquid to a gas
- 8. bits of soil, sand, and rock that are picked up by rivers and dumped in the ocean
- 9. a material found in nature that is useful to humans
Down
- 1. an imaginary line around earth halfway between north and south poles
- 2. to change from a gas to a liquid
- 3. the temperature at which liquid water changes to solid ice
- 5. a flowing stream of water within a larger body of water
- 6. a giant ice sheet that slowly moves out in all directions