16 8 12_c_watercycle

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16 8 12_c_watercycle

  1. 1. en water carbo n nitrog TAKS Objective 5The student will demonstrate an understanding of Earth and Space systems.
  2. 2. en water carbo n nitrog TEKS 8.12 CPredict the results of modifyingthe Earth’s nitrogen, water and carbon cycles
  3. 3. en water carbo n nitrog Lesson Objective1. The student will summarize the effects of human activity on the water cycle: global warming, water quality and water quantity
  4. 4. TheWater Cycle
  5. 5. en water carbo n nitrog QuestionTrue of False: There is plenty ofwater
  6. 6. There is a limited supply of potable water on earth. Earths Water Supply
  7. 7. Earth’s Water
  8. 8. enwater carbo n nitrog Extreme Water
  9. 9. Engage• Use the textbook or pictures from the internet to show students – Diminished water quantity – Diminished water quality
  10. 10. Diminished Water Supply
  11. 11. ExploreThe Environmental Protection Agency• Answer the following questions4. Where is water stored?5. How does water move from one place to another?6. What is infiltration?7. What is runoff?8. How does global warming affect the water cycle? Use information about the effect of (a) the wet cycle and (b) the dry cycle.
  12. 12. Explain• Debrief• Review questions related to the EPA water cycle animated video clip
  13. 13. Where is water stored?Water is stored in oceans, lakes,rivers, and groundwater.
  14. 14. How does water move from one place to another? Evaporation, transpiration, condensation, precipitation.
  15. 15. What is infiltration?Infiltration is water movementbetween the spaces in the soil.
  16. 16. What is runoff?• Runoff occurs when water flows over the ground instead of sinking into the ground.
  17. 17. How does globalwarming affect the water cycle?Include information about theeffect of: a) The wet cycle b) The dry cycle
  18. 18. Global warming intensifies the water cyclebecause the earth’s surface is a little warmer andthis increases evaporation. a). Where there is too much water, there is more water infiltrating and more runoff. This could cause flooding and negative effects on plants and animals living in the area.b). In areas away from a water source moreevaporation and transpiration could dry out the soil.This could lead to lowered ground water supply, andhave negative effects on the plants and animalsliving in the area.
  19. 19. Elaborate• Create a diagram showing the effects of global warming on the water cycle.
  20. 20. Evaluate• Summarize the effects of human activity on the water cycle: global warming, water quality, and quantity.

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