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In this chemistry challenge, learners identify which plants have the enzyme "catalase" that breaks hydrogen peroxide into water and oxygen.

In this chemistry challenge, learners discover that many chemical reactions involve heat loss or gain.

In this activity on page 2 of the PDF, learners discover how color changes can help scientists distinguish between acids and bases.

In this outdoor activity, learners investigate ant behavior by testing ant feeding reactions to different types of food.

In this challenge, learners figure out how to make a juice stain disappear.

In "Chemistry Makes Scents," participants use their noses to distinguish between chemicals with very similar structures.