1. “BROKEN” WATER CYCLE! A FRESH WATER SHORTAGE CRISIS!
6th Grade

2. Write down all of the ways that you used water today.
Water from sink to brush my teeth and wash my face
18 liters for EVERY minute that I took a shower
Water in my coffee
Drinking water

3. About what percent of the water on Earth is available fresh water?

4. How many gallons of water (on average does it take for a bath?)

5. How long many gallons of water does it use up to take a 10 minute shower?
Almost 5 gallons per MINUTE

6. How many gallons of water does it take to flush a toilet once?

7. Water Usage

8. How many gallons of water do washing machines use on average?
25 gallons of water per load!

9. How many gallons of water does it take for washing hands, shaving, and brushing teeth per day?
About 15 gallons

10. What are the 5 major uses of fresh water?
1) Household purposes: (Example: showering, drinking water)
2) Industry: (Example: mining companies need water to cool machinery and flush out mines)
3) Transportation (boats, ferries…can pollute fresh water)
4) Agriculture (farmers need a lot of water to irrigate their fields)
5) Recreation (pools, watering lawns, washing cars)

11. 1) Where We Obtain Fresh Water: http://ed. ted
1) Where We Obtain Fresh Water: ) How We Can Conserve Water!

12. Water used for Industry has increased
In the early 1900s, American industry used about billion gallons of water per day. With a huge growth in industry following World War II, the industrial use of water grew. By 1980, industry was using about billion gallons per day

13. What is the largest consumer of fresh water in the world?
Hydroelectric plants: capture the kinetic energy of falling water to make electricity by using a dam
20% of our electricity in the world is generated by water power

14. In the United States, more fresh water is used for ________ than for any other single purpose.
Irrigation: the process of supplying water to areas of land to make them suitable for growing crops.

15. Colorado River In a desert region
Too little precipitation to meet water needs of people
River flows into 5 states and into Mexico
Used for drinking, irrigation, other uses to the point that the river’s mouth at the Gulf of California is often dried up before it reaches the ocean

16. Colorado River

17. Conservation: the practice of using less of a resource so that it will not be used up What are the 3 R’s?
1) Reduce water
2) Recycle water
3) Reusing water

18. 100+ ways to conserve water: http://wateruseitwisely

19. How can industries reuse, reduce, and recycle water?
Can reuse water that is used to cool machinery
Can reduce water use by turning off the faucet while brushing your teeth
Can recycle water by purifying it

20. If each student in a class of 25 showered for 5 minutes instead of 10, they would save 2,250 liters of water!
Every minute of showering uses 18 liters of water!

21. A few ways to conserve in industry?
Paper mills now only need half the amount of water that they needed in the 1950s to make the same amount of paper
Factories use the same pools of water to cool machinery

22. A few ways to conserve in agriculture?
Using pipes to carry water to fields reduces water loss. When farmers use open ditches for irrigation, a lot of water tends to evaporate before it reaches the fields
Sprinkler irrigation and drip irrigation use pipes to conserve water

24. What are 2 sources of water that are not commonly used but could be used to produce more usable fresh water?
1) oceans –can desalinate water by boiling it, freezing it, or pumping it through a filter
2) icebergs – melting them

25. What are the problems with using desalination and melting icebergs?
1) desalination –very expensive because of equipment & energy it requires
2) icebergs –relocating and melting icebergs could change environment
- Southwest Asia & Santa Barbara, CA use desalination plants