AIM: Why is photosynthesis one of the most important chemical reaction in
the planet?
Photosynthesis: a chemical reaction in which light energy is converted to chemical
energy in the form of glucose
It is the means by which the energy in sunlight becomes usable to living things.


Produces glucose (sugar), which provides the basis for most food chains
Produces Oxygen, which is important if you are an aerobic organism that
requires oxygen for survival.
Photosynthesis is on the cellular level it occurs in organelles called chloroplasts.
Inside the membranes is where chlorophyll and other light absorbing pigments
are found.
Chemical equation:
CO2 + H2O + light energy ---> C6H12O6 + O2
Word Equation:
Carbon dioxide plus water plus sunlight produces glucose & oxygen
How are leaves adapted to carry out photosynthesis ?
Most Photosynthesis in plants occurs in the leaves. -they are thin and flat and
provide the maximum surface area for the absorption of light.
What happens to the products of photosynthesis?
What is Cellular Respiration?
Cellular Respiration: A series of enzyme-controlled reactions in which the energy
stored in glucose is transferred to the high energy molecule "ATP"
It takes place in the Mitochondria.
Glucose + oxygen
Carbon dioxide + water + Enegy (ATP)
C6H12O6 + O2
CO2
+
H2O
+ ATP
Cellular Respiration
1. Aerobic Respiration (most organisms)
Glucose + oxygen
Carbon dioxide + water + Enegy (ATP)
2. Anaerobic Respiration (Fermentation): (Yeast, some bacteria and tired
muscles cells)
2 types:
1. Alcoholic Fermentation (yeast)
Glucose
Carbon dioxide + alcohol + energy
2. Lactic Acid (Fermentaion): Tired muscles cells
Glucose
Carbon dioxide + lactic acid + energy
Aerobic
Oxygen used
Where does it occurs?
Alcohol produced
Lactic Acid produced
Carbon dioxide produced?
Yes
Mitochondria
NO
NO
Yes
Review:
What do cells use ATP for?
What is the word equation for aerobic cellular respiration?
How is fermentation different than aerobic respiration?
How can fermentation be used in business?
Anaerobic
NO
cytoplasm
Yes
Yes
Yes