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In this activity, learners will examine a variety of seeds, describe them, and determine how they are dispersed.

In this activity, learners explore how engineers work to solve the challenges of a society, such as efficient planting and harvesting.

In this outdoor activity, learners investigate the relationship between the slope of a trail and soil erosion.

In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth.

In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy).