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Water treatment on a large scale enables the supply of clean drinking water to communities.

This is a demonstration about how nature inspires nanotechnology. It is easily adapted into a hands-on activity for an individual or groups.

Visitors test solutions of water, sugar, salt, and hydrochloric acid and the solids salt and sugar. They clip leads from the hand generator to wires immersed in each substance.

In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.