1. HYDROSPHERE
The system containing all of Earth’s water.

2. RESERVOIRS
The natural locations where water is stored

3. RESERVOIRS
What are examples of natural reservoirs?

4. RESERVOIRS
What is Earth’s largest natural reservoir?

5. RESERVOIRS
Earth’s largest reservoir is the world's oceans …

6. RESERVOIRS
… which are salty because it contains dissolved minerals.

7. FRESHWATER
Water than contains less than 0.2 % dissolved minerals.

9. RESERVOIRS
Most of Earth’s freshwater is not liquid, but instead frozen as ice in glaciers and in ice caps at the North Pole and the South Pole …

10. RESERVOIRS
… where it can be stored for thousands of years.

11. GROUND WATER
About 20% of Earth’s freshwater is stored below Earth’s surface in cracks and pores.