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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 explore how light and dark colored objects absorb the Sun's radiations at different rates.

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

In this activity/demonstration, learners explore pollen and how insects and animals transport pollen. Learners investigate and compare wind and animal pollination.