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This activity was adapted from SEREAD in collaboration with NIWA.
The temperature of sea water varies all over the world. The ocean waters near the Arctic and Antarctic will be considerably colder than the water near the Equator.
The temperature of the water affects its density. This in turn affects how the water moves in the ocean, and the way deep ocean currents move.
By the end of this activity, students should understand:
  • Cold water sinks below warm water, it is more dense.
  • Warm water will sit on top of cold water.
  • Wind will mix up the layers of warm and cold water.

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