How did the lab activities help you answer the lesson
question: How do environmental changes affect both
living and nonliving things in a watershed?
conclusions can you make based on your observations?

 In the lab activity, I used a virtual watershed to demonstrate how pollutants enter and flow through the watershed. I constructed food chains to show how biotic factors are related. I also predicted and modeled how human activity affected the biotic factors in an ecosystem. Based on my observations, I can conclude that biotic and abiotic factors are closely linked and that human activity that changes the environment, like pollution, can affect all the other parts of an ecosystem in a negative way.

Explanation: Sample Response

the wires in the toaster turning red and the toast crisping and turning brown