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

In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

In this outdoor activity, learners make their own organic-rich soil. Depending on where this activity is done, learners will probably discover that their local soil is low in organic matter.

In this plant science activity, learners role play as vegetables and weeds competing for nutrients.