Download PHOTOSYNTHESIS

PHOTOSYNTHESIS
“To make something with light”
Required elements
•
•
•
•
Chlorophyll
Carbon dioxide from air
Solar energy
water
Part
Function
Property
Chlorophyll
Traps sunlight
Green pigment
Leaves/stomata
Lets in CO2
Holes in bottom of
leaf
Xylem
“up” elevators,
carry water and
minerals up the
plant
hollow
Phloem
“down elevators”
carries food down
to rest of plant
hollow
Sugar
Provides energy for
growth, changed
into fats and
proteins.
Contains carbon,
hydrogen, and
oxygen.
Guard cells
Control amount of
water vapor that
passes out of
leaves
Door that closes
stomata
Steps for photosynthesis
1. Chlorophyll traps sunlight to use as energy.
2. Carbon dioxide enters through the stomata.
3. Water brought from the roots through the
xylem reacts with CO2.
4. Reaction forms a simple sugar.
5. Sugar is stored as starch, used for energy and
converted to fats and proteins.
Steps continued
6. The products travel to the rest of the plant
through the phloem to help it grow and stay
healthy.
7. Oxygen is produced in the reaction and water
vapor.
8. Stomata releases the oxygen and water.
Chemical reaction for photosynthesis