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Energy, Matter, and Living Things
8th grade science
17
Science
8th Grade
12/10/2011

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Term
photosystems
Definition
these pigments are embedded in the membranes of the chloroplast in groups called
Term
photosystems occur in two main phases
Definition
light reactions and dark reactions
Term
light reactions
Definition
are the "photo" part of photosynthesis.
Term
Light
Definition
is absorbed by pigments
Term
Dark reactions
Definition
are the "synthesis" part of photosynthesis.
Term
Light reactions occur on the
Definition
thylakoid membranes
Term
Sugars
Definition
trapped energy from the sun i s converted to the chemical energy of
Term
Light and water
Definition
is required for photosystem process
Term
Chemical energy is
Definition
potential energy stored in chemical bonds, which hold atoms to each other
Term
Exothermic
Definition
occurs if a reaction releases energy
Term
endothermic
Definition
occurs if a reaction absorbs energy
Term
Autotrophs (or producers)
Definition
organisms that make their own food
Term
heterotrophs (or consumers)
Definition
other living things that get energy from food they eat
Term
photosynthesis
Definition
light energt + 6CO2 + 6H2O > C6H2O^ + 6O2
Term
Palisade layer
Definition
where most photosynthesis occurs
Term
stomata
Definition
are openings
Term
thylakoid membranes
Definition
are inner membranes
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