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Groundwater and Pollution

Groundwater and Pollution. True/False Pre-Test/Post-Test. Human activities do not have an effect on groundwater pollution. Groundwater can be contaminated by natural sources.

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Groundwater and Pollution

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  1. Groundwater and Pollution

  2. True/False Pre-Test/Post-Test • Human activities do not have an effect on groundwater pollution. • Groundwater can be contaminated by natural sources. • Human activities such as using pesticides on crops, household chemicals that are poured down a drain and improperly maintained sewage can pollute groundwater.

  3. What is Groundwater? • Groundwater is • close to Earth’s surface. • important part of the water cycle. • water from precipitation that seeps into the soil until it reaches a rock layer that is saturated with water. • one of our most valuable resources.

  4. Storage • Water is stored in the spaces between rock. • It moves slowly underground at a downward angle due to gravity and may eventually seep into streams, lakes or the ocean.

  5. Aquifers • Any underground layer of permeable rock or sediment that holds water and allows it flow to streams, lakes or oceans is an aquifer. • This is a picture of Florida’s Aquifer.

  6. Aquifers • Water can be removed from an aquifer by drilling wells and pumping the out the water. • Pumping a well too fast can cause the water table in an aquifer to drop or the well to dry up completely.

  7. Artesian Wells • Artesian wells do not require pumps.

  8. Recharging aquifers • Precipitation recharges aquifers, but how fast depends on the amount of precipitation as well as the material the water seeps through to get into the aquifer.

  9. Aquifers Continued….. • Movement of water through an aquifer is determined by the permeability of the material that it is seeping through. • Review diagrams of aquifers at: http://ga.water.usgs.gov/edu/earthgwaquifer.html

  10. Groundwater Quality/Pollution • Well water is not always safe to drink without being treated. • Water is an excellent solvent and can contain dissolved chemicals. • The soil and rock that water seeps through is very good at filtering out things like leaves, soil and bugs. • Naturally occurring containments are often present in rocks and sediments, such as iron and manganese.

  11. Groundwater Quality/Pollution • Human activities are the main cause of groundwater pollution and greatly effect water quality. • Review a list of human activities that can cause groundwater pollution at : http://www.lenntech.com/groundwater/pollution-sources.htm#ixzz1xEzw1Gc9 • Review some more natural sources at: http://ga.water.usgs.gov/edu/earthgwquality.html

  12. Other Interesting Facts…… • In the United States • 34.9% of water is used for agriculture, • 47.9% is used for power plants, • 11. 5% for households and businesses and • 5.7% is used for industries and mining. • Fresh water is a limited resource because 97% of water on Earth is salt water.

  13. Resources • http://www.lenntech.com/groundwater/pollution-sources.htm#ixzz1xEzw1Gc9 • http://ga.water.usgs.gov/edu/mearthgw.html • Buckley, M.Sc., Don, Zipporah Miller, M.A.Ed., Michael J. Padilla, Ph.D., Kathryn Thornton, Ph.D., and Michael E. Wysession, Ph.D. "8.1." Interactive Science Florida Course 2, Earth and Space Science. Teacher's Edition ed. Vol. 2. Pearson Education, 2012. 276-287. Print.

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