Salty Waters

The Solar Still Challenge

What happens if you have no access to fresh water?

How can you desalinate salt water?

How can you desalinate salt water?

Solar Still Challenge• You are going to build a solar still and

find out how it can purify water.

• Almost all of the water on Earth is in the oceans and is salty.

• Much of the other water on land is also salty or unsuitable for human use

• The need to purify water is increasing with the human population

What is a Solar Still?• A solar still is a device

which uses solar energy to purify water.

• Different versions of a still are used to desalinate seawater, in desert survival kits and for home water purification

• Follow your instructions carefully