middle school overview of photosynthesis and cell respiration

1. Photosynthesis
and
Respiration
How are they related?

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

3. What is the Process?
 The process of changing light energy (from
the sun or other light source) to chemical
(stored) energy
 This energy is stored as sugar (a
carbohydrate)
 Occurs in plants and some algae
 Plants need light energy,
CO2, and H2O
 Photosynthesis takes place
in the chloroplasts in the green

4. What Happens in this
Chemical Reaction?

5. How Do Scientists Write
this Chemical Reaction?
 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.

6. HUH?
 Plants capture light energy and use that
energy to make sugar (which can be
changed to starch, a carbohydrate, also)
 Sunlight provides the energy needed by
chlorophyll to change molecules of carbon
dioxide and water into glucose
 Oxygen is also released in this reaction

7. Why Is This So
Important?
 We cannot make our own food so 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.

8. Respiration
 There are two types of respiration:
and
breathing (lungs) cell
respiration (cells)

9. What is Cellular
Respiration?
 The process of cellular respiration
is a chemical reaction.
 It is the most important
chemical reaction in our bodies

10. What is the Process?
 Cellular respiration is a process, like
photosynthesis.
 Cellular respiration takes place in the
mitochondria in the cell.
 The mitochondria take in nutrients (glucose and
oxygen), break them down, and release energy for
the cell.
 This process of releasing energy is known as
cellular respiration.
 Takes place in all living things (even plants!)

11. Let’s Write the Chemical
Equation
Glucose + Oxygen Carbon Dioxide +
Water
Or another way of writing the equation is:
C6H12O6 + 6O2 6CO2 +
6H2O

12. Notice Any Similarities?


13. 
Notice any now?

14. Any Similarities with
These?


15. Photosynthesis and
Respiration are Related
 It is the basic cycle on Earth.

16.  Some information from Science-class.net