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In this activity (Page 30 of PDF), learners investigate the evolution of wheat by conducting sedimentation tests on different flours.

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

In this activity, learners investigate soil erosion. Learners set up a simulation to observe how water can change the land and move nutrients from one place to another.

In this activity, learners explore how to protect their skin while applying pesticides to plants.

Learners make their own acid-base indicator from red cabbage. They use this indicator to test substances around the house.

In this chemistry challenge, learners work to figure out which of four juices are real, and which is just food coloring and sugar.

Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.