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In this activity (page 1 of the PDF under SciGirls Activity: Forensics), learners will use a home video camera with a “night vision” mode to test how various inks appear outside the spectrum of visibl

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

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

Use this hands-on activity to demonstrate infrared and thermal radiation.