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In this activity (on page 5 of PDF), learners use dry ice and household materials to make scientifically accurate models of comets.

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

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.

In this activity, learners measure the diameter of their water balloons, model an impact, measure the diameter of the “crater” area, and determine the ratio of impactor to crater.