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In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

In this activity, learners shrink the scale of the vast solar system to the size of their neighborhood.

This lesson will helps learners answer the question: How does the bombardment of micrometeoroids make regolith on the moon?

This is a classic exercise for visualizing the scale of the Solar System.

This guided inquiry three-part activity engages learners in thinking about the mechanism of natural selection by encouraging them to formulate questions that can be answered through scientific investi

In this activity, learners use a model for how fishing affects marine life populations, and will construct explanations for one of the reasons why fish populations are declining.

In this activity (on page 14 of PDF), learners use a pan full of flour and some rocks to create a moonscape.