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This activity focuses on interactions within Earth systems and the effects of human activities. In this activity learners build a biomass pyramid.

In this two-part activity, learners investigate buoyancy, density and surface area as well as biodiversity and the relationship between the structure and function of organisms.

In this four-part activity, learners will discover the exciting world of light--the most important form of energy in our world--and be able to identify and describe different types of light.