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In this activity, learners explore how the area of Arctic sea ice has changed over recent years. First, learners graph the area of Arctic sea ice over time from 1979 to 2007.

Learners follow a three-step process to start their own rock collection.

In this activity (on pages 16-21), learners get a sense of geological time by understanding how big a million is.

In this activity, learners drop impactors onto layers of graham crackers!

In this activity, learners investigate the Moon's infancy and model how an ocean of molten rock (magma) helped shape the Moon that we see today.

In this activity, learners model ancient lunar impacts using water balloons.

In this activity, learners model how the Moon's volcanic period reshaped its earlier features.