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

In this math activity, learners observe and sketch cracking patterns in pavement.

In this activity (on pages 6-11), learners work as a team to investigate how impact craters on Earth, the Moon or other planets take shape and what patterns they make.

In this activity (on pages 10-17), learners discover how scientists study biodiversity and the health of the environment based on inspection of small areas—a process known as sampling.