1. Groundwater

2. 33) 2% of Earth’s total water is frozen in ice caps and glaciers.

3. 34) Less than 1% (0.65%) of Earth’s water is fresh water in lakes and streams, groundwater, and water vapor in the atmosphere.

4. 35) Most of the freshwater on Earth is located in glaciers and ice caps.

5. 36) Groundwater is water that occurs as a liquid resource that is dispersed through innumerable holes, pores, fractures and cavities in bodies of rock or sediment.

6. 37) Porous means the rock has many pores and things can easily penetrate it.

7. 38) When something is impermeable then water cannot easily penetrate it.

8. 39) An aquifer is an underground layer of permeable rock or sediment that contains water.

9. 40) A layer of impermeable rock is located immediately below an aquifer.

10. 41) A layer of permeable rock is located above an aquifer.

11. 42) Aquifers have rocks that have very large pores in them
42) Aquifers have rocks that have very large pores in them. This allows them to hold large amounts of water.

12. 43) How do we get water out of aquifers
43) How do we get water out of aquifers? Pumps pull the water up from the aquifer.

13. 44) What is saltwater intrusion
44) What is saltwater intrusion? Saltwater from the ocean entering a fresh water aquifer.

14. 45) A geyser is formed when heat from magma heats water and forces it to shoot out of the ground.

15. 46) Water in an artesian spring flows naturally out of the ground because of pressure.

16. 47) Springs are naturally formed locations where ground water comes to the surface and wells are man-made structures designed to bring water to the surface from deep underground.