1. Photosynthesis
Chapter 3 Section 3

2. Photo-light
synthesis- to put together
All living things get their energy either directly or indirectly from the sun
Autotrophs- use the sun’s energy directly
Heterotrophs- use the sun’s energy indirectly

3. Chemical equation: (Glucose)
6 CO2 + 6H2O + sun-C6H12O6 + 6 O2
Arrow means “yields

4. definition
In photosynthesis plants and some other organisms use energy from the sun to convert carbon dioxide and water into oxygen and sugars

5. 2 Parts to photosynthesis:
1. capture of the sun’s energy by chlorophyll (pigments)
2. conversion of the sun’s energy to usable chemical energy in the form of glucose

6. Stage 1: Light Dependant Reaction
Occurs in the chloroplasts in the leaves
Green pigment called chlorophyll absorbs the light and converts it to chemical energy (ATP- adenosine triphosphate)
The energy is then used in the second part of photosynthesis

7. Stage 2: Light Independent Reaction
Captured energy is used to make sugars.
Occurs inside the chloroplasts
Water (from roots) & CO2 (from stomata) undergo a complex series of chemical reactions to ultimately produce a 6 Carbon sugar called glucose
O2 is given off as a by-product through the stomata

8. What happens to the sugar?
Plant cells break down sugar to use as energy to fuel life functions
Some are converted into other molecules like cellulose (starch, used in cell parts)
Others are stored to be used for food later (starch, used for food ex. Potato)