Download Photosynthesis - Galena Park ISD Moodle

PHOTOSYNTHESIS
What we know -
Photosynthesis
• Producers are organisms that
produce their own food.
• Green plants are producers –
they convert sunlight into energy
(food).
IN YOUR NOTEBOOK
list some green plants.
Are green plants only located on land?
List some green plants that are found
under water.
Do they carry out photosynthesis?
Radiant Energy
Photosynthesis
What we are learning today-
• Photosynthesis is a chemical
reaction, where radiant energy from
the sun reacts with water and carbon
dioxide to form chemical energy.
• Radiant Energy is required for the
chemical process to take place.
Water
6 H2O
Carbon dioxide
+
6 CO2
Radiant energy (sunlight)
Glucose
C6H12O6
Oxygen
+
6 O2
• Carbon dioxide and water are the
“ingredients” for photosynthesis, and
sugar (glucose) is formed, along with
oxygen.
• The plants use these products (glucose
and Oxygen) to produce food and
energy or will store them for later use.
Photosynthesis
• A process that requires carbon dioxide (CO2) and uses
Radiant (Light) energy and water (H2O) to produce
organic (glucose).
photons
SUN
6CO2 + 6H2O + RE  C6H12O6 + 6O2
Organic glucose
In your notebook draw the leaf
Use the formula to
explain the Process of
photosynthesis
Label what goes in and what comes out of the leaf
What is the leaf making? Will the leaf use the product
immediately or will it be used later?
Where does this all happen?
• To answer this first you must think
– Which part of the plant is usually green?
• How does Carbon dioxide and water get
into that plant part?
• How does Radiant energy get
captured?
Plants
• Autotrophs: self-producers.
• Location:
1. Leaves
a. stoma
b. guard cells
Stoma
Chloroplast
Guard
Cell
Questions:
• How does Radiant energy get captured by
the leaf?
• Where does photosynthesis take place?
Chloroplast
Draw a chloroplast organelle in your notebook
Chloroplast
• Organelle (or a pocket) where photosynthesis
takes place.
• Contains Chlorophyll
– Absorbs Radiant (light) Energy
Outer Membrane
Inner Membrane
Chlorophyll
Question:
• Why are plants green?
Chlorophyll Molecules
• Chlorophyll pigments (COLOR) absorb energy
(photons) by absorbing certain wavelengths
(blue-420 nm and red-660 nm are most
important).
• Plants are green because the green
wavelength is reflected, not absorbed.