1. Two ways organisms get energy from food
Photosynthesis
Plants ONLY!
Cellular Respiration
Plant AND animals

2. Photosynthesis

3. Photosynthesis
Converts the sun’s energy into chemical energy stored in sugar (called glucose)
Takes place in specialized structures inside plant cells called chloroplasts
Chlorophyll is the pigment that absorbs sunlight.

4. Photosynthesis Reactants 6CO2 + 6 H2O + light energy → C6H12O6 + 6O2
Reactants Products
The food plants make is called glucose (sugar)
Reactants

5. Photosynthesis Video

6. Photosynthesis Song

7. Cellular Respiration
Cells
Breathing

8. Cellular Respiration
Food (such as glucose) is broken down into carbon dioxide (CO2) and water (H2O), and energy is released
The energy, ATP, supplies energy that fuels the cell’s activities
Takes place in the mitochondria

9. Cellular Respiration C6H12O6 + 6O2 → ATP + 6CO2 + 6H2O
Happens in both plant and animal cells
Overall Reaction:
C6H12O6 + 6O2 → ATP + 6CO2 + 6H2O
Reactants Products

10. Reactants → Products Chemical Reactions Reactants Products
What you need to make something
All items to the left of the arrow
Products
What you make
All items to the right of the arrow

11. Opposite Reactions! Photosynthesis
6CO2 + 6 H2O + light energy → C6H12O6 + 6O2
Cellular Respiration
C6H12O6 + 6O2 → ATP + 6CO2 + 6H2O