Name____________________________________Date___________________Hour____
Go the website: Illuminating Photosynthesis
This is bookmarked on your teacher’s webpage.
www.pbs.org/wgbh/nova/methuselah/photosynthesis.html#
Read the page and answer the questions.
1. What’s the vital function that photosynthesis performs?
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2. How do breathing animals “repay” the plants during photosynthesis?
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Click on the box that says “Go To Illuminating Photosynthesis”
Click on the tab on the top left that says “The Cycle”
Use the pictures and key to help you answer the questions about photosynthesis.
3. Click on the window in the picture. What happens?
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4. Click on the watering can in the picture. What happens? What is going on inside the
plant?
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5. When you click on the girl, two things begin to happen in the picture. What are they?
a. ______________________
b. ______________________
Click on the tab on the top that says “Atomic Shuffle”
6. What does photosynthesis “trap”? _______________________________
7. What do plants make during the process of photosynthesis? _________________
8. What would happen if there was no photosynthesis?
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Click on “Next”
9. Where do plants get the H2O to begin the process of photosynthesis? (2 places)
a. ______________________
b. ______________________
Click on “Next”
10. Where does energy come from? ______________________________
11. What happens to the hydrogen atoms?
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12. What happens to the oxygen atoms? Where do they go?
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Click on “Next”
13. How does CO2 get into a leaf?
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14. Where does CO2 come from?
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Click on “Next”
15. CO2 goes through changes and becomes ______________.
Click on “Next”
16. What is the food called that a plant makes with carbon, hydrogen and oxygen?
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Click on “Next”
17. What is the chemical formula for photosynthesis?
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Click on the tab that says “Three Puzzlers”. Answer the following questions.
18. Can a tree release enough oxygen to keep just one person alive? _____________
19. Can a plant stay alive without light? __________________
20. If we took all the O2 away, can a plant still grow? ___________________
** Now go back to your teacher’s webpage and explore the science links that are
bookmarked on her page. Please DO NOT go to any other website.