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In this outdoor, freshwater activity, learners explore the behavior and food preferences of crawdads (or crabs) by "fishing" for them with various baits.

An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

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

In this activity, learners create a freshwater ecosystem in a large plastic bottle. Learners cut and prepare bottles, then fill with water, aquatic plants, snails and fish.