Lecture about photosynthesis and cellular respiration and how they relate to one another. (modified from a previous version)

2. 
The process of photosynthesis is a
chemical reaction.

It is the most important chemical
reaction on our planet.

3. The process of changing light energy (from the
sun or other light source) to chemical energy
 This energy is stored as sugar (a carbohydrate)
 Occurs in plants and some algae


4. 
Plants need light energy, CO2, and H2O
Where does all of this happen?
 Photosynthesis takes place in the
chloroplasts of a leaf
› It uses chlorophyll: the green
pigment in plants


See Picture on next slide

7. What does this mean?
 Six molecules of carbon dioxide react
with six molecules of water to form 1
molecule of glucose and six molecules of
oxygen.


8. 
What is the difference between a
molecule and an atom?
› Atom: smallest unit which something can
exist (carbon, nitrogen, hydrogen, etc.)
› Molecule: made up of two or more atoms
(H2O, CO2, etc)

9. 


What does sunlight do for the plant?
Sunlight provides the energy needed by
chlorophyll to change molecules of
carbon dioxide and water into glucose
› Is something missing?
Oxygen is also released in this reaction
(O2)

10. 
We cannot make our own food (glucose,
energy), we must get our food from
plants.
› Plants are the first step in the food chain.

The oxygen released during
photosynthesis is necessary for all living
things.

12. 
There are two types of respiration:
and

13. 
The process of cellular respiration
is a chemical reaction.

It is the most important chemical
reaction in our bodies

14. 
Cellular respiration is a process, just
like photosynthesis.
 Where does this process take place
though? Any guesses?
› Cellular respiration takes place in the
mitochondria!
› See Image on next slide!

16. Takes place in all living things (even
plants!)
 The mitochondria takes in nutrients
(glucose and oxygen), break them
down, and create energy for the cell.


17. Glucose + Oxygen
Carbon Dioxide + Water
Or another way of writing the equation is:
C 6 H 12 O 6 + 6O 2
6H 2 O
6CO 2 +

18. 
It is the basic cycle on Earth.

19. 

20. Notice any now?

22. 
http://www.pbslearningmedia.org/resource/