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In this optics activity, learners experiment with polarizers (small dark rectangles) to examine light intensity.

In this activity, learners use their imaginations and picture a scene in their heads.

In this activity, learners explore their eye pupils and how they change.

In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

Use this Moon Map Guide to help learners identify features on the Moon, while looking through a telescope.