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