Hot, Cold, Fresh and Salty

In this activity, learners observe the effects of the layering of warm and cold water and water that is more or less saline than regular water. They will discover how the effects of salinity and temperature are the root cause of thermohaline layering in the ocean.

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Jerry Roth
NOAA Ocean Service
Activity takes two to three 40-minute class periods. Additional materials required.

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Teaching Tips

Teaching Tips

This is a straightforward lesson with clear points that should be apparent if done as recommended by the instructions.

Very clear instructions for teacher and students.

Student worksheet needs to be copied and pasted into a MS Word document.

Students will need careful guidance when mixing liquids or else desired results will not be seen.

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