1. How do you use water? Agenda for Wednesday Sept. 7 th 1.Collect syllabus/safety sheets 2.Set-up notebooks 3.Water intro 4.Water cycle 5.Video Lab Tomorrow – need signed safety sheets

2. How do we use water?

3. HOW MUCH WATER IS THERE TO DRINK? 97% = OCEAN'S (SALTY) 3% Freshwater 2% = GLACIERS (ICE) 1% = DRINKABLE WATER Freshwater 31% available to drink69% is in glaciers

5. Water Where there is water there is life – where water is scarce, life has to struggle or just "throw in the towel" "universal solvent“ – It dissolves more substances than any other liquid – Wherever water goes, ground or bodies, it takes along valuable chemicals, minerals, and nutrients See it in 3 states in nature: solid, liquid, gas

6. Water Covers approximately 71% of Earth's surface Life evolved in water Living things are 70-90% water In nature, water is a solvent for many kinds of chemical reactions Forms hydrogen bonds with other polar or charged particles freezes at 32 o Fahrenheit (F) and boils at 212 o F 6

7. Hydrogen bonding gives water cohesive property Water molecules are attracted to other polar substances – adhere to many kinds of materials 7

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10. The Water Cycle Describes the existence and movement of water on, in, and above the Earth Earth's water is always in movement – always changing states, from liquid to vapor to ice and back again The water cycle has been working for billions of years All life on Earth depends on it continuing to work

11. Water Cycle 1.Infiltration – water seeping into the ground 2.Evaporation – water becoming a gas and floating up into the atmosphere 3.Condensation – water changing from a gas to a liquid) 4.Precipitation – water falling down to Earth from the atmosphere

13. List the four steps to the water cycle Agenda for Thursday Sept 8 th 1.Review water cycle 2.Finish video 3.Water cycle reading 4.Lab Learning Objectives 1.Describe the steps of the water cycle 2.Describe how a drop of water travels through the water cycle

14. What water is best to drink?

15. Describe the journey of a drop of water through the water cycle. Agenda for Friday Sept 9 th 1.Lab 2.Discuss lab Learning Objectives 1.Describe the steps of the water cycle 2.Describe how a drop of water travels through the water cycle

16. What happens when pollution gets into rivers and lakes? Agenda for Monday Sept 12 th 1.Water cycle review 2.Water readings (pollution) 3.Bottled water lab continued Objectives 1.Identify local sources of pollution 2.Describe how local sources of pollution can be harmful to us.

17. Where does your bottled water come from? municipal water supplies – reverse osmosis – removes large molecules/ions – Deionization – mineral ions removed – carbon filtration – removes pesticides, volatile organic chemicals – Ozonation – eliminates inorganic, organic and microbiological problems, taste and odor problems