This document provides a review of key concepts in photosynthesis for an IB Biology exam. It includes definitions of photosynthesis and pigments, outlines the light and dark reactions of photosynthesis, and describes factors that limit the rate of photosynthesis such as light intensity, temperature, and carbon dioxide concentration. It also discusses how photosynthetic organisms have transformed the Earth's atmosphere, oceans, rock deposition, and facilitated the evolution of multicellular life over geological time.

1. IB Biology: Photosynthesis Review (2.9) NAME:
1. Define photosynthesis.
The conversion of __________________________ into _________________________ in plants
2. Write the generalized equation for photosynthesis using words and chemical symbols:
Word:
Symbol:
3. What are the two main uses of the glucose produced in photosynthesis?
4. Visible light is made of many different wavelengths. Match the ranges of wavelengths below with their colors.
a. 400-500nm =
b. 500-650nm =
c. 700-800nm =
5. Define action spectrum.
6. What is a pigment? (and what is the main photosynthetic pigment?)
7. Draw the action spectrum of photosynthesis and the absorption spectrum of chlorophyllon the axes below:
8. Annotate the diagram above to explain why most leaves look green.
9. Summarize the two main stages of photosynthesis:
Light Dependent Reactions (1st
) Light Independent Reactions (2nd
)
Reactants
Products
Light energy
required?
Location in
Chloroplast
Summary

2. 10. Describe two ways in which the rate of photosynthesis can be measured.
11. Outline the effects of the following limiting factors on the rate of photosynthesis. Sketch a graph for each one.
Light intensity
Temperature
Carbon dioxide concentration
12. Describe the Great Oxidation Event:
13. Photosynthetic organisms have caused many changes to the Earth over time. Outline how these organisms have affected
each of the following.
a. The atmosphere:
b. The oceans:
c. Rock deposition:
d. Evolution of multicellular organisms: