What color in the spectrum is most visible?
green
Everything above _% of light energy reflected is visible to the human eye
50%
If more energy is reflected is it more or less visible?
MORE
If more energy is absorbed is it more or less visible?
LESS
Absorption of colors from most to least visible
green, yellow, orange, red, blue, violet
What colors absorb the most light?
red, blue, violet
What kind of energy comes from the sun?
electromagnetic radiation
What size waves does high and low energy come in? Which is more dangerous?
small waves=more energy=more dangerous
long waves=low energy=less dangerous
What enters the leaf?
Co2, sunlight, water
What exits the leaf?
O2, water, sugar
In what form does water enter and exit the leaf?
Enters as a liquid, exits as a gas
What are the reactants for photosynthesis? How do they enter the leaf?
Co2 and water
Enter through the underside
What are the products of photosynthesis? How do they leave the leaf?
Sugar and oxygen
Leave through the underside
What kinds of cells have chloroplasts? Where does photosynthesis take place?
Palisade mesophyll
How does the placement of the veins help transport materials to and from the leaf?
Water and sugar are close to the veins and can easily go in and out of the cell
What layers does the light energy travel to reach the palisade mesophyll?
Upper cuticle and upper epidermis
Palisade mesophyll vs. other parts of the leaf
PALISADE MESOPHYLL: bigger, more SA, cylindrical, towards the top, compact
OTHER: spherical, towards the bottom, has holes/pores
How does the shape of the palisade mesophyll increase the amount of photosynthesis taking place?
Greater SA means more photosynthesis happens
What is the purpose of the waxy layer?
Contain water inside the plant
What is found between guard cells? Where is it? How does this help the leaf retain water in dry conditions?
Stoma
Opening for underside
Stroma covered it
What gases are found in the air spaces?
Co2, oxygen, water vapor
Process of photosynthesis
Water enters through the roots, into the veins, and into palisade mesophyll. Co2 comes through underside and into stoma, spongy layer and palisade mesophyll. In the palisade mesophyll the oxygen and sugar are made. Sugar goes into veins and thought the plant. Then sugar goes through cell respiration.