1. Todays’ Goals – class ends 11:35 1.Pick up 1 of each of the 3 handouts. 2.Take out your water usage & histogram. 3.Review Scientific Method (lab)  QUIZ TOMORROW 4.Complete Post-lab activities & questions. (lab) 5.HW: Analyze water usage & study for Scientific Method quiz.

2. WATER

3. CHEMQUANDARY It takes 120 L of water to produce one 1.3 L can of fruit juice and about 450 L of water to place one boiled egg on your breakfast plate. How can you explain this?

4. Uses of Water: 1. Direct -measureable water use -water actually used (drink a glass of water) 2. Indirect -hidden uses of water -water used to produce or manufacture something

5. Hydrologic Cycle (Water Cycle)

6. Hydrologic Processes Condensation -water vapor changes to liquid -ex. Cloud to rain Precipitation (rain, snow, hail, etc.) Evaporation -liquid state changes to gaseous state Percolation -water moving throughout the soil

7. Sources of Water Surface Water – comes from a river, lake, reservoir or other body of water Ground Water – comes from a well –Drilled into aquifers: a water bearing layer of rock, sand or gravel.

9. WATER

10. Thoughtfully answer these questions on a separate piece of paper. What are 2 ecological problems the world has concerning water? If the world’s amount of water never changes, why doesn’t everyone in the world have clean water to drink?