earth science

3. Sediment that is frozen for more than two consecutive years
5. The total amount of empty pore spaces in the rock
7. The saltiness of water
9. Passageway where particles and dissolved substances are transported
10. Fresh water found in the rock and soil layers beneath the surface
11. The process that ice can directly transform into water vapor
13. The water trapped and held down by pressure between rock above the aquifer
15. zone. The are where the ground water where the groundwater flows out of the aquifer
16. time. The average length of time spent by water molecule in a reservoir
17. Land areas where water covers the surface for significant periods
20. Large inland bodies of fresh or saline water

1. Permanent body of ice
2. water budget. The total amount of water in the planet
4. The process in which liquid water changes into vapor
6. The second layer of the ocean
8. Hydrologic cycle. The movement of water around the earth's surface
12. zone. The land area where water enters the ground and replenish the ground water
14. aquifer. An aquifer in which groundwater is free to rise up to its natural level
18. A moving body of surface water that flows downslope toward sea level because of gravity
19. sheet. A mass of glacial land ice