A definition:
Photosynthesis!
Five things are needed for photosynthesis: (3 are inputs)
SUNLIGHT
Gives the plant energy
WATER
Travels up
from the roots
of the plant
CHLOROPHYLL
The green
molecules that
absorb sunlight
to provide
energy for
photosynthesis
CARBON DIOXIDE
Enters the leaf through small holes
on the bottom
Temperature
The word and chemical equations for photosynthesis:
Carbon dioxide + water
6CO2
+ 6H20
Sunlight
Chlorophyll
Sunlight
Chlorophyll
glucose + oxygen
C6H12O6 + 6O2
Four factors affect photosynthesis:
1.
Light – Light provides energy for photosynthesis to happen in
the first place. If there is more light, photosynthesis happens
faster.
2.
Water – helps the chemical reaction happen. If there is not
enough water photosynthesis slows down or even stops.
3.
CO2 – Provides the carbon for the chemical reaction. If there is
more carbon dioxide, photosynthesis will happen quicker.
4.
Temperature – the best temperature is about 59 – 100 degrees
Fahrenheit – anything above or below will slow photosynthesis
down
3 inputs
2 outputs
 Inputs
 Water
 Light
 Carbon
Dioxide / CO2
 Outputs
 Glucose
 Oxygen
(sugar)
Why do you think plants
are green?
Why are plants green?

Whenever you see that something has a
color, that part of the light spectrum is
being reflected, while other colors are
being absorbed
 If
your shirt is red, the red part of the light
spectrum is being reflected, while the green
and blue parts are being absorbed

There is more red and blue light than there
is green
 So,
reflecting green and absorbing everything
else means the plant gets to absorb the most
light possible!
Photosynthesis Song

What What…

https://www.youtube.com/watch?v=lDwUVpOEoE4
Exit Slip
Why might plants turn yellow and
wilt?
2. Why would a plant die if it was
sealed in a Tupperware container?
3. What 3 inputs are required for
photosynthesis?
4. What is one output produced by
photosynthesis?
1.