Topic: 1:11

Food Chains and Food Webs

Topic 1.11 - College Board Topic Summary Information

Topic 1.11 - PowerPoint and Textbook Resources

Food Chains and Food Webs

Textbook PP. 72-73

Topic 1.11 - College Board Videos to Watch

Go to: https://apclassroom.collegeboard.org/d/wu4ma1duc6?sui=14,1 to watch Topic 1.11 Daily Video 1 which depicts the flow of energy and nutrients in two or more food chains and shows how a food web is a model of an interlocking pattern of food chains.

Go to: https://apclassroom.collegeboard.org/d/zkkzmi63cn?sui=14,1 to watch Topic 1.11 Daily Video 2 which demonstrates how a trophic cascade results in both positive and negative impacts on food webs.

Go to: https://apclassroom.collegeboard.org/d/10n0cpj9eh?sui=14,1 to watch Topic 1.11 Daily Video 3 which provides an example of some human impacts on food webs.

Take notes on these video that summarize important key points. Focus your notes not just on content, but also how you are going to demonstrate you mastery of the content using science practices. Be sure to answer and questions that are asked when you pause the video. Check your answers!

Topic 1.11 - Other Videos to Watch to Increase Content Mastery

Mr. Smeades explains food chains and food webs in this short video.

Mr. Villarreal explains food chains and food webs in this short video.

Food Chains and Predator-Prey Cycles

After watching this video can you answer the following questions?

1.What does every food chain begin with? Why are producers so important? Producers are the source of all the ___ in a community.

2.What are primary consumers? What are secondary consumers? What are tertiary consumers?

3.What are predators? What are prey?

Ecology - Food Chains and Food Webs

After watching this video can you answer the following questions?

1.What do food chains and food webs show?

2.What do the arrows in food chains represent? What is each stage in a food web known as?

3.Why are decomposers important in an ecosystem? What are some examples of decomposers?

4. In order to create an ecosystem you need a physical environment - what does this include?

5.What are herbivores? Carnivores? Omnivores?

6.What are food webs? What can happen if one part of a food web is eliminated?

Trophic Cascades in Salt Marsh Ecosystems

After watching this video can you answer the following questions?

1. What makes salt marshes so productive?

2, What are marshes important to humans?

3. What determines plant abundance in an ecosystem? What does it mean to be controlled by bottom up or top down mechanisms?

4. What conclusions were made from this investigation. In other words, what happens when you lose predators like blue crabs? Why is it important to have predators around?

Check Your Understanding:

Log on to your CollegeBoard MyAP account and answer the questions in the quiz posted. Be sure to complete the quiz by the deadline given.

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