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PBS
Pbs Learning Media: Water Cycle
Students are asked to explain how clouds participate in the water cycle. [0:32]
Ohio State University
Osu: Beyond Weather and the Water Cycle: The Sun: Earth's Primary Energy Source
Extensive article that discusses the first principle of climate science, i.e., that the Sun is the primary energy source for the climate system of the Earth. Presents five concepts for this principle and explains each, providing...
University of Victoria (Canada)
Weather Watch: Water Cycle
Excellent discussion and illustration of the water cycle. Explained in an easy to understand format.
NASA
Nasa: What Is Ocean Color?
This site from NASA explains the meaning behind the different colors of the oceans. Gives information as to the role of phytoplankton in the color of the oceans and affects of the carbon cycle on the oceans.