Desalination requires around two gallons of sea water to make one gallon of fresh water—that's quite a ratio! Viewers consider the pros and cons of desalination as one option to providing fresh water. They learn about two different desalination methods in the sixth lesson of a 10-part unit on Fresh Solutions.

Concepts

desalination, water, drinking water

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Additional Tags

science

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Instructional Ideas

• Research the ways boats that stay at sea for long periods of time get fresh water
• Ask class members to investigate the water conservation and recycling issues on the space station

Classroom Considerations

• Relies on knowledge of the scarcity of fresh water

Pros

• Includes closed captioning for easier note taking
• Offers a forward-looking viewpoint to inspire scientists of the future

Cons

• None

Common Core

SL.6.2 SL.7.2 SL.8.2 SL.9-10.2 RST.6-8.4 RST.9-10.4