Standard 4: Students will understand that water cycles through and between reservoirs in the hydrosphere and affects the other spheres of the Earth system.

Objective 1: Explain the water cycle in terms of its reservoirs, the movement between reservoirs, and the energy to move water. Evaluate the importance of freshwater to the biosphere.
c. Relate the physical and chemical properties of water to a water pollution issue.
d. Make inferences about the quality and/or quantity of freshwater, using data collected from local water systems.
e. Analyze how communities deal with water shortages, distribution, and quality in designing a long-term water use plan.