Water

1. The number of hydrogen atoms in water
4. The ___ Cycle: The continuous movement of water on, above, and below the surface of the Earth
6. The number of oxygen atoms in water
9. Liquid or frozen water that forms in the atmosphere and falls to Earth
10. This phase of water is the most dense
11. Inland lakes, groundwater, and ___ are available freshwater sources
13. Water freezes at ___ degrees Celsius

1. The number atoms in one molecule of water
2. This phase of water is the least dense
3. The Sun and ___ are two factors that power the movement of water in and around the world
5. The curved surface at the top of a column of liquid
6. Most of Earth's water can be found in the ___
7. Most fresh water is locked away in ___
8. Water___at 100 degrees Celsius
12. Phase changes from a solid state to a liquid state require heat ___