Source: D4K: “Water"
Visit the D4K companion Web site to learn more about Water: D4K: “Water"
This video segment from IdahoPTV's D4K informs us that only 3% of all the water on earth is fresh water, but most of that is frozen. Only .3% is available for use. See how the power of a river formed Hells Canyon on the Snake River in Idaho. Learn why it's important to conserve water.
[JOAN CARTAN-HANSEN] Water is always on the move. The constant movement of water is called the water cycle. When the sun heats water in the ocean some of it evaporates forming clouds. The water falls to the earth as rain, sleet, hail or snow. Some in the lakes and rivers and some of it falls into the ground becoming ground water. Over time the water in the rivers and the ground water travels back to the oceans completing the water cycle.
Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co.
We assign reference terms to each statement within a standards document and to each media resource, and correlations are based upon matches of these terms for a given grade band. If a particular standards document of interest to you is not displayed yet, it most likely has not yet been processed by ASN or by Teachers' Domain. We will be adding social studies and arts correlations over the coming year, and also will be increasing the specificity of alignment.