 A model of a
terraced mountain, where the water gathers in pools
at each level before descending to the next level.
 "Hmm, so that's how
filters work!"
 Here a student
explains her own project to others.

More explanations... Good questions, Good answers. |

This demonstrates the progression of water from stream to pools,
down to the pipes leading to fields for irrigation.

This cross-section of a mountain, shows a water cistern built into it's
side, in open caves and tunnels. That collected water drips slowly onto the
fields planted on the sides of the mountain. |