1. Photosynthesis & Cellular Respiration
EQ: How does carbon cycle within the biosphere?

2. Photosynthesis The word photosynthesis comes from two Greek words:
photo meaning ‘light’
synthesis meaning putting together
so photosynthesis means “putting together with light”.

3. Photosynthesis
Plants used the absorbed light, available CO2 (carbon dioxide) and water to build sugar molecules and release oxygen back into the atmosphere
Plants store energy on the forms of simple sugar (glucose)

4. Photosynthesis Equation
Carbon Dioxide + Water + sunlight  Glucose + Oxygen
6 CO2 + 6 H2O + sunlight-
C6 H12 O6 + 6 O2

5. Cellular Respiration
Organisms eats the plants and their bodies break down the glucose and releases some of the carbon back into the air as Carbon Dioxide (CO2).
Carbon is also released as Carbon Dioxide (CO2) through organic waste and the decay of the organism’s body.
Water is also released during the respiration process.

6. Cellular Respiration Equation
Glucose + Oxygen  Carbon Dioxide + Water + Energy
C6 H12 O6 + 6 O2  6 CO2 + 6 H2O + Energy

7. Photosynthesis
Cellular respiration
Occurs in the presence of light
Occurs at all times
Requires energy (light) to make sugar (Glucose)
Releases energy from sugar (Glucose)
Carbon dioxide and water are the raw materials needed
Carbon dioxide and water are the waste products
Oxygen is given out
Oxygen is taken in
This cycle of photosynthesis and cellular respiration help maintains the balance of carbon dioxide and oxygen on earth.