This is the first of a four-part series on the water cycle, which follows the journey of water from the ocean to the atmosphere, to the land, and back again to the ocean. Students review the video and answer questions.
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Did you know that you can estimate the amount of energy that the plants absorb for any given location on Earth using NASA data? We call that the "energy efficiency" of photosynthesis. This is the ratio of the amount of energy stored to the amount energy of light absorbed. You can use these data to evaluate and model photosynthesis efficiency.