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In this activity, learners use a pneumatic trough (see related activity) to generate and collect pure oxygen.

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

In this activity, learners build a "pneumatic trough," a laboratory apparatus used for collecting pure gas samples over water.

Bones are stiff, which helps us lift heavy things and walk around, but they are also somewhat flexible, which lets them bend slightly.

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

In this activity, learners test and compare the physical properties of thermoplastic polymers. Learners compare different plastics based on their color, degree of transparency, texture, and density.

In this activity, learners use three types of cheesy snacks--cheese balls, cheese puffs, and Cheetos--to learn about polymers.

Some animals can swallow food whole, but humans have to chew. In this activity, learners will investigate what saliva does chemically to food before we even swallow.