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In this activity, learners compare and contrast their own skin (including the area covered) with that of an orange.

In this activity, learners repeat patterns in two and three dimensions to create tessellations.

In this activity on page 5 of the PDF (Plants—The Green Machines), learners use chromatography to separate and identify pigments within various leaves.

In this physical sciences activity, learners explore how passive solar design increases energy efficiency.

In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.

In this environmental health activity, learners investigate their own vital lung capacities.

This activity (on pages 13-18) has learners build a model tree and then figure out how to make their tree stand up by itself.