Pumping it up
Everyone needs clean water. Without it, we couldn't survive. But if you don't live on the shore of an unpolluted lake, pond, river or stream, where can you get it?
This education module, which can be downloaded as a PDF, explores how water is stored underground and how it can be pumped to the surface. With practical instructions for an experiment, Q&A and teacher notes, the module complies with National Science Education Standards Levels K-4 and 5-8.
Using pebbles, soil and water, students will observe the effects of gravity as the water seeps through the spaces to create layers and eventually form an underground store. They will then use a pump mechanism to bring this water to the surface.
The Q&A encourage students to discuss their experiment and help them gain a clear understanding of where our clean water comes from.
The earth material under your feet isn't completely solid. It's made up of layers that can have all types of tiny spaces 
Thanks To Michael DiSpezio
This module is written by Michael DiSpezio, dubbed "one of the world's most entertaining science educators" by National Geographic.
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A young girl pumps water for her family in northern Ghana.
Credit: WaterAid / Jon Spaull
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