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In this activity on page 3 of the PDF, learners visualize the relative size and structural differences between microbes that have the potential to cause disease.

This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

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

Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.

In this activity (on pages 2-8), learners experience how scientists use classification in their study of animals.

In this activity, learners investigate visual perception as well as plan and conduct their own experiments.

In this activity, learners solidify their conceptualization of cells by building a model of a cell in a ziplock bag.

In this activity, learners investigate the touch sensory system and discover how to plan and carry out their own experiments.