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Freshwater

Freshwater. The Earth is 70% water - 97% of the water is salt water - 3% of the water is fresh water What are some of the ways that you use water every day? Where does the water that you use come from? Is water a finite or infinite resource? How do you know?. Freshwater vs. Saltwater.

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Freshwater

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  1. Freshwater

  2. The Earth is 70% water - 97% of the water is salt water - 3% of the water is fresh water • What are some of the ways that you use water every day? • Where does the water that you use come from? • Is water a finite or infinite resource? How do you know?

  3. Freshwater vs. Saltwater How much of Earth’s water is freshwater? We will make a model of Earth’s freshwater. • Take the plastic cup, and imagine that the cup is a model of Earth’s surface. • Fill up ~ 75% with water. This represents how much of Earth’s surface is covered with water. • Take out one eye-dropper of water, and place it in the small medicine cup. This represents how much of Earth’s water is freshwater- ~ 2.5% • Take one drop of this water- this represents how much freshwater is easily accessible to us!

  4. Freshwater is a precious resource. http://ga.water.usgs.gov/edu/earthwherewater.html

  5. Where is all the water on Earth?

  6. Saltwater versus Freshwater

  7. “The Freshwater Connection” • http://pmm.nasa.gov/education/videos/gpm-freshwater-connection

  8. How do we use freshwater in US? Freshwater is used for transportation, agriculture, heating and cooling, industry, livestock, and many other purposes. That one percent of water is primarily used in eight different ways, or categories: • Domestic. Residential home indoor and outdoor use, such as drinking, cleaning, and watering lawns • Public supply. Public and commercial buildings, such as schools and restaurants • Irrigation. Watering systems for farms that grow food

  9. Livestock. Watering systems for animals on ranches and farms • Aquaculture- Watering systems for fish farms and hatcheries • Industrial -Water used for manufacturing products, including food, paper, and petroleum products • Mining- Water used for extracting natural resources such as metals, minerals, natural gas, and oil • Thermoelectric- Water used for generating electricity using steam-driven generators

  10. Estimated Water Use in US Thermoelectric 49% Public Supply 11% Domestic 1% Irrigation 31% Other- 8%: Mining 1%, Industrial 4%, Aquaculture 2%, Livestock 1% From the American Water Works Assoc.

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