1. Autotrophic nutrition! Auto = self Troph = nurish
Photosynthesis
Autotrophic nutrition!
Auto = self
Troph = nurish

2. Autotrophs
Autotrophs – organism capable of producing its own food; plants!
Sometimes referred to as producers

3. Autotrophs
Examples: flowers, plants, trees, fruits, vegetables

4. Heterotrophs
Heterotroph - Organisms that cannot make their own food, they need to consume it
Also called CONSUMERS
Hetero = other
Examples: animals, fungus, some bacteria

5. Autotrophic Nutrition
PHOTOSYNTHESIS: light energy from the sun is changed into chemical energy in the form of glucose in plants

6. Photosynthesis

7. Chemosynthesis
CHEMOSYNTHESIS - process by which some organisms, like certain bacteria, use chemical energy to produce carbohydrates

9. CHEMICAL FORMULA FOR PHOTOSYNTHESIS
Sunlight + CO2 + H20
C6H12O6 + O2
ENERGY + Carbon Dioxide +Water
Glucose + Oxygen
Ingredients
Raw Materials
Reactants
End Products

10. Summary of Photosynthesis
Light energy is absorbed by the CHLOROPLAST
Energy is used to make oxygen and glucose from the raw materials of CO2 and H2O
Glucose – C6H12O6 - sugar molecule produced by photosynthesis

11. GLUCOSE provides all of our cells with energy!!
C6H12O6

12. Process of Photosynthesis
Sunlight is made up of many different colors of light.
These colors make up the visible light of the ELECTROMAGNETIC SPECTRUM

13. RED ORANGE YELLOW GREEN BLUE INDIGO VIOLET
There are 7 colors in the electromagnetic spectrum
ROY G BIV
RED
ORANGE
YELLOW
GREEN
BLUE
INDIGO
VIOLET

14. RED and BLUE wavelengths are the most effective colors of light for photosynthesis
CHLOROPHYLL is a green pigment in plants that absorbs the light that is needed for photosynthesis

15. Absorption of Light by Chlorophyll

16. Why are plants green? Yes they have chlorophyll…the green pigment
Then why is chlorophyll green?!

17. Where does photosynthesis happen?
in the LEAF of the plant, there are organelles called CHLOROPLASTS

19. Two sets of reactions in Photosynthesis
First Reaction –
Takes place in Grana or Thylakoids
These reactions are called light dependent or photochemical

20. First Reaction
In this part of the chloroplast, light splits water (H2O) into HYDROGEN and OXYGEN
The HYDROGEN stays inside the chloroplast but the OXYGEN leaves the plant and this is the oxygen that we breathe in!!

21. Second Reaction
The second reaction takes place in the STROMA (liquid part of the chloroplast)
This is where the CALVIN CYCLE takes place. It is also known as LIGHT INDEPENDENT, or DARK REACTION.
Calvin Cycle – process in stroma of plants where carbon enters as CO2 and leaves as glucose; light independent reaction.

22. Second Reaction
Here CARBON DIOXIDE combines with HYDROGEN from the light reactions to make GLUCOSE
The GLUCOSE is stored in the plant for use as energy for life processes.