chemistry-sodium alginate-water trick
Drought in a cup trick

You will need three identical cups, a beaker of water and some sodium polyacrylate.

Place some sodium polyacrylate in the bottom of one of the cups.

 

 

 

How is it possible to make so much water disappear?

 

Click for an explanation of sodium polyacrylate

 

 

Worksheet on observation for year 7 introduction to science