2. Objectives TAKS Objective 5 The student will demonstrate an understanding of Earth and Space systems. The student will demonstrate an understanding of Earth and Space systems. TEKS Science Concept 8.12 The student knows that cycles exist in Earth systems. The student is expected to: The student knows that cycles exist in Earth systems. The student is expected to: © predict the results of modifying the Earth’s nitrogen, water and carbon dioxide cycles.

3. Diminished Water Supply

8. The Water Cycle The Water Cycle

9. There is a limited supply of potable water on earth. Earth's Water Supply

10. Earth’s Water

11. Explore The Environmental Protection Agency

12. Where is water stored? Water is stored in oceans, lakes, rivers, and groundwater.

13. How does water move from one place to another? Evaporation, transpiration, condensation, precipitation.

14. What is infiltration? Infiltration is water movement between the spaces in the soil.

15. What is runoff? Runoff occurs when water flows over the ground instead of sinking into the ground.

16. How does global warming affect the water cycle? Include information about the effect of: a) The wet cycle b) The dry cycle

17. Global warming intensifies the water cycle because the earth’s surface is a little warmer and this 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 more evaporation and transpiration could dry out the soil. This could lead to lowered ground water supply, and have negative effects on the plants and animals living in the area.

18. Elaborate Create a diagram showing the effects of global warming on the water cycle. Create a diagram showing the effects of global warming on the water cycle.

19. Evaluate Summarize the effects of human activity on the water cycle: Summarize the effects of human activity on the water cycle: global warming, water quality, and quantity.