In this astrobiology activity (on page 11 of the PDF), learners consider what organisms need in order to live (water, nutrients, and energy). Learners select an environment at random and identify what they must provide in order to keep their organisms alive. Learners then create the growing environment, make predictions about growth, and observe the environment for ten days. This lesson guide includes background information, handouts, and a math extension. [Activity is publicly available through a web crawler capture on Archive.org.]