1. Photosynthesis Video 1 http://www.youtube.com/watch?v=RNufj-64OO0
Watch the video to answer the following questions in a discussion:
How do autotrophs differ from heterotrophs? How are they the same?
What do plants do with most of the sugar they produce during photosynthesis?
How do decreasing levels of CO2 affect plants? How do you think increasing levels of CO2 affect plants?

2. Photosynthesis Video 2 http://www.youtube.com/watch?v=mpPwmvtDjWw
Watch the video to answer the following questions in a discussion:
Where do plants get the raw materials for photosynthesis?
What do plants take up through their roots? Which of these substances are used for photosynthesis?
Where does the chemical reaction of photosynthesis take place?

3. Cellular Respiration Video http://www.youtube.com/watch?v=Sr9rYgYS1Fc
Watch the video to answer the following questions in a discussion:
What is cellular respiration?
Do plant cells respire?
What kinds of molecules are used for cellular respiration? Give specific examples.
What is the use of ATP? How does this make them vital to the functioning of cells?

4. Watch the video to answer the following questions in a discussion:
Comparing Photosynthesis and Cellular Respiration
Watch the video to answer the following questions in a discussion:
What is needed for photosynthesis to occur? Be as specific and complete as you can in your answer.
What is needed for cellular respiration to occur? Be as specific and complete as you can in your answer.
Do autotrophs need to carry out cellular respiration? Why or why not?