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In this activity, learners make their own heat waves in an aquarium.

The Ancient Egyptians used a naturally-occurring salt from the banks of the Nile River, called natron, to mummify their dead.

In this outdoor activity/field trip, learners investigate the special shapes, holding structures and holding behaviors that real organisms use in streams, rivers, creeks or coast intertidal zones to a

Glare from the sun and ripples from the wind can make it hard to see what's below the surface of a body of water.

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