Students explain why dissolved oxygen is important in aquatic ecosystems. They evaluate the optimal dissolved oxygen levels for living organisms.

Young scholars evaluate the effects of temperature changes on the metabolic rate of a clam. Conclusion questions are addressed which help students to process and articulate their experiences.

Using maps and graphs of large data sets collected in FrogWatch, learners will determine the range, preferred land cover, and proximity to water of the American bullfrog to figure out the bullfrog's requirements for food, water, and...