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Making a hydrometer
Students find the relationship between density and salinity and density and temperature. This is an adaptation from Interaction of Earth and Time.
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Salty or Not: A Taste of the Bering Sea
Many arctic mammals, such as polar bears, seals, and walruses, depend on the sea ice about 3 m thick for their habitat. Pupils investigate the properties of polar water and polar ice and their properties through readings, videos, and...
6th - 8th Science CCSS: Adaptable