This NASA visualization shows sea surface salinity observations (September 2011-September 2014). Students review the video and answer questions.
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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.
Teachers who are interested in receiving the answer key, please contact MND from your school email address at firstname.lastname@example.org.
Watch NASA videos about aerosols and volcanic ash and answer questions.