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Some aquatic organisms live in open water, while some live in soil at the bottom of a body of water.

Many people get water from a source deep underground, called groundwater.

In this physics activity, learners will explore buoyancy.

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

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.

Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

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

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?