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Photosynthesis
Chapter 8
26
Biology
9th Grade
01/20/2012

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Term
Photosynthesis
Definition
Plants use energy from sunlight to convert water and carbon dioxide into high energy carbohydrates, sugars, starches, oxygen, and waste products.
Term
Autotrophs
Definition
Make their own energy.
Term
Photoautotrophs
Definition
use sunlight to make and store energy through photosynthesis
Term
Chemoautotrophs
Definition
use inorganic chemicals to obtain energy through chemosynthesis
Term
Heterotrophs
Definition
consume other organisms for energy
Term
Consumers
Definition
use cellular respiration to release energy from materials they eat
Term
decomposers
Definition
break down once living organic material
Term
Energy forms
Definition
Light Energy
Heat energy
chemical energy
Term
Electromagnetic Spectrum
Definition
Energy waves and particles get released from the sun
Term
Wavelenghts
Definition
measured in nanometers and is the distance between repeating units of a propagating wave of a given frequency.
Term
Endothermic reactions
Definition
Energy is absorbed
Term
Exothermic reactions
Definition
energy is released
Term
catabolic reactions
Definition
chemical bonds are broken
Term
anabolic reactions
Definition
chemical bonds are formed
Term
inner and outer membrane
Definition
surrounds the chloroplast
Term
stroma
Definition
space between structures
Term
thylakoid
Definition
saclike structures that contain pigment
Term
granum
Definition
stack of thylakoids
Term
Light dependent reaction
Definition
requires the direct energy of light that splits water molecules to make energy carrier molecules that are used in the second process
Term
Photophosphorylation
Definition
adding a phosphate and ATP and NADPH made from carbon diioxide go to light independent reactions
Term
Light independent reaction
Definition
(Calvin-benson Cycle) occurs when the products of light reaction and Co2 are used to form C-C covalent bonds of carbohydrates
Term
ATP
Definition
consists of Adenine a 5-carbon sugar called ribose and three phosphate groups
Term
pigment
Definition
plants gather the suns energy with light absorbing molecules
Term
Chlorophyll
Definition
the plants principle pigmment that reflects green light
Term
Photosystems
Definition
proteins in the thylakoid membrane that organize chlorophyll and other pigments into clusters
Term
Plants that use 4 carbons
Definition
Sugarcane, corn and crabgrass
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