1. What Powers Life?

2. How is life sustained on Earth? What is their relationship?
The Big Ideas
How is life sustained on Earth?
Photosynthesis
Respiration
What is their relationship?

3. One process that sustains all life on earth
What Powers Life?
One process that sustains all life on earth
Photosynthesis
Energy
Food
Oxygen

4. How is Life Sustained on Earth?
Through photosynthesis:
Plants make biochemical energy from light
Plants make food (foundation of food chain)
Plants make oxygen

5. Photosynthesis light make
Photosynthesis is a series of chemical reactions that convert light, CO2 and H2O to produce glucose (stored chemical energy) and O2
photo synthesis
light make

6. Photosynthesis 6 CO2 + 6 H2O → C6H12O6 + 6 O2
Pictorial form:
Scientific form:
Light Chlorophyll
6 CO2 + 6 H2O → C6H12O6 + 6 O2
Carbon dioxide Water Glucose Oxygen
Chloroplast

7. Chlorophyll Pigment
Photosynthesis occurs in the chloroplast organelle using the chlorophyll pigment

8. Respiration
Cellular respiration is a series of chemical reactions that convert biochemical energy stored in food into adenosine triphosphate (ATP), CO2 and H2O
Roughly speaking, respiration is similar to combustion (energy release) and is the reverse of respiration (energy storage)

9. Respiration C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP Pictorial form:
Scientific form:
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + ATP
Glucose Oxygen Carbon dioxide Water Energy
Mitochondrion

10. Photosynthesis vs Respiration

11. Photosynthesis vs Respiration

12. Big Ideas
Through photosynthesis, plants make biochemical energy, food and oxygen
Through respiration, biochemical energy is released to power life
Photosynthesis and respiration make up the big “circle of life”

13. What Photosynthesis Needs?
Station 1:
What needs to be in the water? Sugar or CO2?
Station 2:
Which wavelength is best? Red, blue or green?
Station 3:
What brightness is best? Closer or further?

14. Date Photosynthesis Page
Question: What does photosynthesis need?
Hypothesis: Photosynthesis needs ______
Experiment: Take a plant and visit stations Station 1 _____ Station 2 _____ …
Conclusion: Photosynthesis needs _____

15. E7 Life Science Quiz 3 1) The cell theory states that: (circle one)
a) All organisms are made up of cells b) The cell is the basic unit of organisms
c) All cells come from pre-existing cells d) All of the above
2) All cells have these common components: (circle one)
a) Cell membrane b) Cytoplasm c) Cytosol d) DNA e) All of the above
3) Some cells have small organs called ________________________.
4) The cell nucleus stores and replicates the cell’s __ __ __.
5) ________________ uses respiration to release energy.
6) ________________ uses photosynthesis to store energy.
7) True or false? Passive transport does not need energy input.
8) True or false? Passive transport moves things from low to high gradient.
9) True or false? Passive transport includes diffusion and osmosis.
10) True or false? Active transport includes endocytosis and exocytosis.