The "Bottled Bacteria" activity instructions are a bit unclear, but the remaining activities investigating limiting factors in ecosystems are well-written. Learners model the exosystem of a bear and a herd of deer. They set up a...

Learners test the factors that influence the rate at which a virus spreads through a population. They complete a lab activity then discuss data collected and review and answer a set of questions.

Students study the biotic and abiotic factors of an environment.  In this exploratory lesson students examine the different trophic levels and how organisms are connected. 

Students survey and describe a stream ecosystem. They sample the benthic macroinvertebrate populations of a given stream and determine community structure through the use of the Chandler Index and a species diversity index.

Students investigate the composting process through a variety of experiments. In this ecology lesson, students discuss the benefits of composting. They examine how compost affect plant growth.

Seventh graders complete a virtual online salt marsh tour. In groups, they observe and identify the various types of animals found in the marsh. After categorizing the animals, they create a food web based on the animals role in the...