1. UNIT 5: Photosynthesis & Cell Respiration

2. ENERGY AND LIFE Living things depend on energy
Sun is source of most energy
2 types of organisms,
AUTOTROPHS make their own food (Ex: plants, bacteria*, protists*)
HETEROTROPHS get energy from the foods they consume (animals, fungi)

3. Essential Question #1:
What are the reactants, products, and basic functions of photosynthesis?

4. What is Photosynthesis?
The process of photosynthesis is a C________ R__________.
It is the most important
chemical reaction on our planet.

5. What is the equation for the chemical reaction of photosynthesis?

6. What is the equation for the chemical reaction of photosynthesis?
Six molecules of carbon dioxide react with six molecules of water to form 1 molecule of glucose and six molecules of oxygen.

7. Describe Photosynthesis
The process of changing light energy to chemical energy
Energy stored as S_________
Occurs in plants and some a_______
Takes place in the chloroplasts, using chlorophyll, the green pigment in plants

8. What happens during photosynthesis?
Plants capture light energy using the organelle known as the C_______and use that energy to make glucose
Sunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucose
Oxygen is also released in this reaction

9. What happens during photosynthesis?
Carbon dioxide enters the leaf
CO2 combines with the stored energy in the chloroplasts through a chemical reaction to make glucose
The sugar (glucose) is moved through tubes in the leaf to the roots, stems and F_____of the plants
Some of the sugar is used right away by the plant for energy; some is stored as S______; and some is built into plant tissue

10. Why is this important to us?
We cannot make our own food (glucose, energy). We must get our food from plants.
Plants are the first step in the food chain.

11. Why is this important to us?
The O_________ released during photosynthesis is necessary for all living things.
This is actually a WASTE product for the plant!

12. Essential Question #2
What are the reactants, products, and basic functions of cellular respiration?

13. What is Cellular Respiration?
The release of chemical energy for use by cells.

14. What is Cellular Respiration?
Once the energy that was in sunlight is changed into chemical energy by P________, an organism has to transform the chemical energy into a form that can it can use!
This process is cellular respiration.

15. Describe Cellular Respiration
The breakdown of G_______ molecules to release energy
Takes place in all living things
Is a step by step process

16. What is the chemical equation for cellular respiration?

17. Essential Question #3
How are photosynthesis and cellular respiration related?

18. Read how photosynthesis & respiration are related:
Learn more about photosynthesis at:
Read how photosynthesis & respiration are related:

19. Photosynthesis & Cell Respiration
Compare the chemical reaction of Photosynthesis to the chemical reaction for Cell Respiration
PHOTOSYNTHESIS
6CO2 + 6H2O  C6H12O6 + 6O2
CELL RESPIRATION
C6H12O6 + 6O2  6CO2 + 6H2O

20. Essential Question #4
What is the role of adenosine triphosphate (ATP) to energy transfers within a cell?

21. CHEMICAL ENERGY AND ATP
All living things use C__________- energy
A chemical compound that cells use to store and release energy is ATP (ADENOSINE TRIPHOSPHATE).

22. CHEMICAL ENERGY AND ATP
ATP is like a fully charged B________ ready to power the machinery of a cell.
ATP powers many cellular activities Ex:
active transport across C_____M______
Making P_______
muscle contraction.

23. Cellular Respiration
Cellular respiration makes ATP (energy) by breaking down sugars.
Cellular respiration requires oxygen.
Cell respiration takes place in M________ of the cell.
mitochondrion
animal cell

24. ATP  ADP (Don’t copy) ATP is a high energy molecule.
Produced when food is used for energy (cell respiration) ADP ATP
Used when plant capture sunlight energy (photosynthesis) ATP ADP