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Chapter 15 (Science)
Chapter 15 in my science book
12
Science
7th Grade
01/04/2011

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Term
elements-
Definition
substances that cannot be broken down into simpler substances (made of identical atoms)
Term
matter-
Definition
mass/space
Term
atoms-
Definition
smallest particle of matter
Term
cell membrane-
Definition
lets certain materials in/ out ("semi permerable")
Term
diffusion-
Definition
molecules move from areeas where there are few
Term
osmosis-
Definition
diffusionn of water
Term
active transport-
Definition
requires energy ""faciltated diffusion" helper proteins- molecules that are too large to go through on own
Term
passive transport-
Definition
release of waste in a cell
Term
metabolism-
Definition
total amount of energy used
Term
producer-
Definition
organism that can produce their own food (plant)
Term
consumer-
Definition
an organism that relys on producers (humans)
Term
fermentation-
Definition
releases energy when little/ no O2 is available using only glucose
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