1. Energy Flow- Photosynthesis & Cellular Respiration
Focus Question:
Where do plants and animals get their energy from?

2. Energy Flow Radiant energy is energy that comes from the Sun
Light energy is seen by humans; it’s absorbed by plants in the chlorophyll and converted into chemical energy during photosynthesis.
0.023% absorbed by plants

3. Energy Flow
Chemical energy is the energy stored in the bonds of compounds and molecules.
0.023% absorbed by plants

4. Producers and Consumers
Producers (green plants) create glucose or chemical energy from light energy. They do not need to consume other organisms to get energy.
Consumers are organisms which need to eat (consume) other organisms to get their energy. They cannot perform photosynthesis.

5. Photosynthesis
Producers perform photosynthesis to create high-energy sugars (glucose), which the plant then uses or stores.

6. carbon dioxide + water glucose + oxygen
Photosynthesis
Write the word equation for photosynthesis.
carbon dioxide + water glucose + oxygen
Write the chemical equation for photosynthesis.
CO2 + H2O C6H12O6 + O2
sunlight
chlorophyll
sunlight
chlorophyll

7. Try This Try holding your breath for as long as you can.
Why do you feel you need to breathe after a while?

8. Cellular Respiration
Cellular respiration occurs in the cells of producers and consumers, releasing energy stored in glucose.
By breaking the bonds in glucose, the chemical energy that was stored in them is released, making it available to be used.

9. Cellular Respiration Write the word equation for cellular respiration.
glucose + oxygen carbon dioxide + water + ENERGY
Write the chemical equation for cellular respiration.
C6H12O6 + O2 CO2 + H2O + ENERGY

10. How are the processes related?
The Reactions
How are the processes related?

11. How are they related?

12. Complementary Processes
Cellular respiration and photosynthesis are complementary processes because the products of one reaction are the reactants of the other reaction.
ie. CO2 and H2O are produced in cellular respiration and needed for photosynthesis to occur.