Cellular Respiration Webquest - Ms. Fassio's Science Site



Objective: You will use information from a series of websites to answer questions about photosynthesis. These websites will give you an overview of how energy from the sun is captured by plants and used to build carbohydrate (sugar) molecules called glucose.

Directions:

A. Go to the website for your class: fassioscience..

B. Click on the tab for “Biology,” then click on the “Cellular Energy” tab. Below today’s date you will find links that you should click to visit the websites mentioned below.

C. If you have headphones, plug them into your computer. You will need them later in the activity.

WEBSITE 1 - Photosynthesis Overview

1. In a complete sentence, describe photosynthesis? (What is its purpose?)

2. What are the reactants of photosynthesis? (What goes in?)

a. b. c.

3. What are the products of photosynthesis? (What is made?)

a. b.

WEBSITE 2 - Photosynthesis Details

Click on the tab called “the Cycle.”

4. What three things must be present before the plant can produce oxygen?

a. b. c.

Click on the tab called “Atomic Shuffle.”

5. If plants could not do photosynthesis, what would happen to life on our planet?

6. Water is a reactant of photosynthesis. How are water molecules changed in the leaf?

7. It takes energy to rearrange molecules. Where does the energy to change the water molecules come from?

8. The holes in leaves through which CO2 enters are called _______________________.

9. How are CO2 molecules changed in the leaf?

10. What is the chemical equation for photosynthesis?

11. Photosynthesis produces water (H2O), oxygen gas (O2), and a sugar called glucose (C6H12O6). What type of macromolecule is glucose? ___________________________. The answer to this question is not on the website. You will have to think back to our unit on Chemistry.

Click on the tab called “Three Puzzlers”

12. An average-sized tree can produce enough O2 to keep how many people alive? _________

13. Can a plant stay alive without light? Explain your answer in 2-3 sentences.

14. If all of its oxygen was removed, would a plant be able to survive? Explain your answer in 2-3 sentences.

Return to WEBSITE 1 - Photosynthesis Overview

15. During photosynthesis, energy changes forms. Radiant energy from the sun (solar energy) is converted to what type of energy during photosynthesis?

In the menu on the left of the page (light blue background), click on Concept 2: Electromagnetic Energy.

16. What is the range in wavelengths of visible light? ____________________________

In the menu on the left of the page (light blue background), click on Concept 3: The Action Spectrum for Photosynthesis.

17. Describe the experiment done by Thomas Engelmann to learn which wavelengths (colors) of light were most effective in carrying out photosynthesis in the green alga Spirogyra.

18. Which wavelengths are the most effective for photosynthesis? How do you know?

WEBSITE 3 - Photosynthesis Animation (USE HEADPHONES, IF POSSIBLE)

19. Which organelle is the site of photosynthesis? ______________________________

20. What are the stacks of membranes inside the chloroplast? _______________________

21. What is the semiliquid substance inside the chloroplast? _________________________

22. From what molecule does photosystem II get replacement electrons from? _____________

WEBSITE 4 - Interactive Photosynthesis

23. In your own words, describe the process of photosynthesis at the molecular level.

24. What is the role of the NADPH molecule in photosynthesis?

Click on the “Strategy/Players” tab on the left.

25. What are the two main stages of photosynthesis?

a. b.

26. Hover over the chloroplast. What are stacks of thylakoids called? ___________

27. Click on Light Reactions. What happens when light strikes the pigments?

WEBSITE 5 - Photosynthesis Article: Why Leaves Change Color

28. Chlorophyll are pigment molecules that are found in chloroplasts. Chlorophyll absorbs _________________ from sunlight that is used to transform ____________________ and ____________________ into ____________________, such as sugars and starch.

29. Why do leaves change color?

30. What does this say about their ability to do photosynthesis?

If you finish before class ends, start working on the Cellular Respiration Webquest.

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