How does temperature or pH effect enzyme activity? Design an experiment to explore the effect of temperature or pH on enzyme activity in a catalyzed food reaction.

* Evidence, Models, Explanation

Design an experiment to demonstrate how altering the number of secondary consumers in a community changes the community dynamics.

In a lab setting compare diatoms found in diatomaceous earth with current diatoms (can use prepared slides or fresh water samples). How are they similar and how are they different? How have species of diatoms changed over time?

Using data collected on your average respiration rate at rest, while walking, and after exercising vigorously for 10 minutes, explain how a recreational scuba diver's oxygen needs differ from a demolition and recovery scuba diver's. Assuming they are both 180 lb males, how would their nutritional needs differ? Be specific.

* Systems, Order, Organization

*Unifying Concept (NSES) represented in this activity. Unifying concepts cross curricular areas and provide students with productive and insightful ways of thinking about and integrating basic ideas that explain the natural and designed world.