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Freshwater 6th Grade Science
I. Supply and Demand A. Types of Use 1. Home 2. Industry 3. Transportation 4. Agriculture - Irrigation 5. Recreation
I. Supply and Demand B. Amount 1. Average U.S. =  340 Liters per  day C. Conservation 1. Reduce i. Shower: 18 liters per minute 	ii. Paper: 227 liters water per kg paper (cut ½) 	iii. Drip lines 	2. Reuse i. Sink water for plants…
D. Producing 1. Desalination (expensive) 2. Icebergs (Weather)
II. Water to Drink  A. Quality 1. Acidity (6.5 to 8.5) i. Acid ruins pipes 2. Hardness (mineral in water) i. Prevents soap formation ii. Leaves behind deposits 3. Organisms (bacteria)
B. Treating Water 1. Filtration = Remove large particles in water (screen) 2. Coagulation = Add sticky particles to filter pieces 3. Chlorination = Kill living things 4. Aeration = Removes odors and tastes 5. Testing = Make sure quality
C. Wastewater 1. Waste treatment plant 2. Septic System
III. Pollution A. Where 1. Point Source = Known spot of entry into water 2. Nonpoint Source = Widespread entry 3. Effects = Pesticides
III. Pollution B. Human Wastes 	1. Sewage i. Cities 	ii. Rural Areas 	2. Industrial i. Chemicals 	ii. Smoke 	iii. Heat
III. Pollution C. Chemical Run-off 	1. Farms i. Fertilizers  - Aid growth of algae (use up O2) 	ii. Pesticides – Kill animals downstream 2. Roads i. Spills – Gasoline, oil 	ii. Treatments – Salting roads
D. Solutions
IV. Amounts A. Droughts 1. Long periods without rain
B. Flood 1. Water overflows banks 2. Flash Floods
C. Flood Precautions
V. Water Power A. Energy 1. Kinetic Energy – Moving Energy 2. Potential Energy – Stored Energy for future use B. Hydroelectric Power (9% in U.S.) 1. Convert kinetic energy to electrical energy 2. Advantage – Clean, Safe, Renewable 3. Disadvantage – Expensive, Dramatic change in life

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Freshwater

  • 2. I. Supply and Demand A. Types of Use 1. Home 2. Industry 3. Transportation 4. Agriculture - Irrigation 5. Recreation
  • 3. I. Supply and Demand B. Amount 1. Average U.S. = 340 Liters per day C. Conservation 1. Reduce i. Shower: 18 liters per minute ii. Paper: 227 liters water per kg paper (cut ½) iii. Drip lines 2. Reuse i. Sink water for plants…
  • 4. D. Producing 1. Desalination (expensive) 2. Icebergs (Weather)
  • 5. II. Water to Drink A. Quality 1. Acidity (6.5 to 8.5) i. Acid ruins pipes 2. Hardness (mineral in water) i. Prevents soap formation ii. Leaves behind deposits 3. Organisms (bacteria)
  • 6. B. Treating Water 1. Filtration = Remove large particles in water (screen) 2. Coagulation = Add sticky particles to filter pieces 3. Chlorination = Kill living things 4. Aeration = Removes odors and tastes 5. Testing = Make sure quality
  • 7. C. Wastewater 1. Waste treatment plant 2. Septic System
  • 8. III. Pollution A. Where 1. Point Source = Known spot of entry into water 2. Nonpoint Source = Widespread entry 3. Effects = Pesticides
  • 9. III. Pollution B. Human Wastes 1. Sewage i. Cities ii. Rural Areas 2. Industrial i. Chemicals ii. Smoke iii. Heat
  • 10. III. Pollution C. Chemical Run-off 1. Farms i. Fertilizers - Aid growth of algae (use up O2) ii. Pesticides – Kill animals downstream 2. Roads i. Spills – Gasoline, oil ii. Treatments – Salting roads
  • 12. IV. Amounts A. Droughts 1. Long periods without rain
  • 13. B. Flood 1. Water overflows banks 2. Flash Floods
  • 15. V. Water Power A. Energy 1. Kinetic Energy – Moving Energy 2. Potential Energy – Stored Energy for future use B. Hydroelectric Power (9% in U.S.) 1. Convert kinetic energy to electrical energy 2. Advantage – Clean, Safe, Renewable 3. Disadvantage – Expensive, Dramatic change in life