1. Where energy comes from….
Photosynthesis
Where energy comes from….

2. Photosynthesis
Photosynthesis: The process that captures the sun’s energy to make food.
Photo= “light”
Synthesis=“putting together”
Turns light energy into chemical energy

3. Chlorophyll Chlorophyll is a chemical in chloroplasts
that can absorb or trap light energy
This is green pigment is found
mostly in plant leaves

4. Atoms An atom is the basic unit of ALL living & non-living things
Atoms are made of:
Protons (+)
Neutrons (no charge)
Electrons (--)

5. Elements
An element is a form of matter that is made of only 1 type of atom
Elements are found on the periodic table & each has a different number of protons
Examples: Carbon, Oxygen, Nitrogen, Hydrogen

7. Common Elements found in the Air, Ocean, Living Things, & the Earth’s Crust
Element Name
Chemical Symbol
Calcium Ca
Nitrogen N
Hydrogen H
Oxygen O
Carbon C
Silicon Si
Aluminum Al
Iron Fe
Sodium Na
Potassium K
Magnesium Mg

8. Chemical Symbols Elements are represented using chemical symbols
Examples:
-Oxygen (O)
-Hydrogen (H)
-Carbon (C)
-Calcium (Ca)

9. Compounds
When two or more atoms of different elements combine this forms a compound.
The letters represent the element name
The number represents how many
Examples: Water (H2O)

10. Photosynthesis Compounds
Raw Materials: (What is needed)
Products : (What is made)
Sunlight /energy
Sugar/Glucose (C6H12O6)
Water (H2O)
Oxygen (O2)
Carbon Dioxide (CO2)

11. Chemical Equation for Photosynthesis
6H2O + 6CO2 + Light Energy  C6H12O6 + 6O2
Raw Material+ Raw Material = Products
Chemical equations show how things change in a chemical reaction.

12. How do these thing get to the plant?
Water is taken in by the roots
Carbon dioxide enters through stomata in the leaves

13. Photosynthesis at Work
The sugar produced during photosynthesis stores energy for producers
Oxygen is released as a
waste product

14. Photosynthesis and food webs
Energy is the basic need of all living things
Photosynthesis is the base of the food web

15. Cellular Respiration
The release of energy

16. How does food turn into energy?
Food goes into your digestive system
Once digested it enters your bloodstream
Next it enters the cell through diffusion!
Respiration occurs inside the cell using oxygen in both plants & animals!

17. Respiration
Respiration: The process cells use to break down stored food energy (glucose).
When glucose is broken down =
energy is released

18. Respiration Compounds
Raw Materials: (What’s needed)
Products: (What’s made)
Oxygen (O2)
Energy (ATP)
Glucose (C6H12O6)
Carbon Dioxide (CO2)
Water (H2O)

19. Chemical Equation for Respiration
C6H12O6+ 6O2 6CO2+ 6H2O+ Energy
Raw Materials + Raw Materials = Products
Does this look familiar?

20. Photosynthesis Video Respiration Video

21. Where do photosynthesis & respiration occur in the cell?
Chloroplast
Cellular Respiration
Mitochondria