1. RUNOFF

2. The movement of water on a surface to areas of lower elevation.

3. ACCUMULATION

4. A buildup or gathering of something that occurs over time.

5. PRECIPITATION

6. Rain, snow, sleet, and hail that falls from clouds in the sky.

7. CONDENSATION

8. Physical change in matter from a gas to a liquid.

9. EVAPORATION

10. Physical change in matter from a liquid to a gas.

11. WATERCYCLE

12. The constant movement of water through the land, air, oceans, and living things.

13. SALT WATER

14. Water found in oceans (and few lakes) that contains 3-4% salt.

15. FRESH WATER

16. Water found in rivers, lakes, glaciers, ice sheets, and underground that contains low concentrations of salt.

17. OCEAN

18. The entire body of saltwater that covers about 71% of Earth.

19. GROUND WATER

20. Water that collects in cracks and pores in underground soil and rock layers.