1. Photosynthesis & Cellular Respiration
OR…
HOW THINGS
GET THEIR
ENERGY

2. Our objectives include:. 1. Analyzing the flow of energy through
Our objectives include: 1. Analyzing the flow of energy through living systems, 2. Comparing and contrasting autotrophs and heterotrophs, Reviewing and answering questions about metabolism, Defining two types of metabolism.

3. Energy in Living Systems
Directly or indirectly, almost all of the energy in living systems needed for metabolism comes from the sun.
Remember, energy is the ability to do work.
F O O D C H A I N

4. Autotrophs are organisms that obtain energy by making their own food.
Most autotrophs, such as plants, use sunlight as their source of energy.
Heterotrophs are organisms that take in food to meet their energy needs.
Most heterotrophs, such as you and your pet, use energy called ATP as their source of energy.

5. Compare and contrast Autotrophs and Heterotrophs
Compare
Contrast
Heterotrophs
Energy involved? Yes or No
Living Thing? Yes or No
Energy? needed or released
Energy source?: sun or other living thing
Autotrophs
Living Thing? Yes or No
Energy source? sun or other living thing

6. But how do autotrophs and heterotrophs get their energy?
They must
B U I L D or
break down
molecules that store energy.
youtube.com/watch?v=5qjgEKqVkSo

7. You now know what metabolism is, but did you know the TWO main types?
1. Photosynthesis Cellular Respiration

8. In the next lesson we are going to discuss photosynthesis

9. A quick vocab review before we start!

10. Photosynthesis: the process by which plants use sunlight, carbon dioxide, and water to produce carbohydrates (food) and oxygen.
Glucose: the type of carbohydrate (food) that plants make during photosynthesis

11. Chloroplast: the organelle found in eukaryotic plant cells where photosynthesis takes place
Chlorophyll: the green pigment inside of the chloroplast where sunlight is trapped

13. Cellular Respiration: the process by which cells produce energy (ATP) from carbohydrates (glucose).
ATP (adenosine triphosphate): the type of energy that runs a cell; cell batteries
Mitochondria: the organelle found in all eukakryotic cells where glucose is turned into ATP

14. Chemical Reaction: a breaking and reforming of covalent bonds to form a new chemical compound
Reactants: chemical compounds that go into a chemical reaction
Products: chemical compounds that come out of a chemical reaction

16. ________________________________
Photosynthesis
Word Equation
________________________________
Chemical Equation

17. Goal of Process: make food (glucose) for plant cells
Where in the cell does this process take place? Chloroplast
What attracts sunlight to the chloroplast?
chlorophyll

18. Anabolic (building up a biomolecule requiring an input of energy) or
Catabolic (breaking down a biomolecule and releasing energy)?
Photosynthesis is _________________.
What living organisms do Photosynthesis?
____________________________________
Photosynthesis Video
Open notes quiz!

19. ________________________________
Cellular Respiration
Word Equation
________________________________
Chemical Equation

20. Goal of Process: turn food (glucose) into energy for the cell (ATP)
Where in the cell does this process take place? Mitochondria

21. Anabolic (building up a biomolecule requiring an input of energy) or
Catabolic (breaking down a biomolecule and releasing energy)?
Cellular Respiration is _________________.
What living organisms do Cellular Respiration? ___________________________
Cellular Respiration Video
Open notes quiz!

22. Fermentation
Some cells can make ATP without oxygen. Examples: muscle cells and yeast cells. But…they pay the price
If a cell needs ATP from Glucose
Glycolysis (break down of glucose)
Aerobic
(if oxygen is available)
Cellular Respiration
Many ATP made!
Anaerobic
(if oxygen is NOT available)
Fermentation
Some ATP made; extra waste produced

23. Fermentation: the process in which cellular energy (ATP) is made without oxygen
Another word for fermentation is anaerobic which means without oxygen.
If your cells needed to make energy in the absence of oxygen…it would still make that energy (ATP), but you would pay a price. Some form of waste would be produced.

24. Examples of Fermentation
Chemical Equation for Fermentation in Muscle Cells
_____________________________________________
Chemical Equation for Fermentation in Yeast Cells
______________________________________________

25. Photosynthesis & Cellular Respiration Practice
Process
What goes in?
What comes out?
Where does this happen?
Photosynthesis
Words:
Chemical Formulas:
Cellular Respiration
Fermentation