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This exercise is designed to teach young learners the different parts of a plant (root, stems, leaves, flowers, fruit, and seeds), the basic functions of each part, and to show that tiny microscopic o

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

This activity (on pages 19-25) is about fleas and ticks, which are common pet parasites.

A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.