Across
- 2. the fresh water beneath Earth's surface
- 4. a measurement of the surface of something
- 7. how much space something takes up
- 11. an educated guess about a number
- 12. the process of a liquid changing to a gas
- 13. water with salt in it, such as the ocean
- 14. a large area of fresh water beneath Earth's surface
Down
- 1. all the water (solid, liquid, gas) on and around planet Earth
- 3. water that is not salty, such as the water in most lakes and rivers
- 5. a special kind of mixture where you cannot tell the different parts from each other
- 6. information that can be used to support or reject an idea
- 8. when two substances mix together and it looks like one of them disappears
- 9. a large area of frozen water, found in places that are cold all year long
- 10. a combination of two or more things