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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

In this activity about depth perception, learners create an optical illusion in a shoe box.

In this simulation of natural selection, learners use binder clips in three different sizes to represent the diversity of beak sizes in a bird population.

Using indirect methods, learners determine the shape and size of a piece of carpet hidden under a piece of plywood.

In this optics activity, learners explore diffraction by adding wax blocks to a ripple tank. The wedge-shaped blocks act as obstacles that the wave must bend around.

Learners explore the relationship between energy consumption, population, and carbon emissions in the countries of the Americas.

In this outdoor activity, learners first explore lizard feeding behavior by creating a "lizard rig" to dangle different objects in front of live lizards and see which objects the lizards try to bite.

In this activity, learners will explore how the human brain interprets environmental stimuli.

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