how much of something in an area

movement of molecules from high to low concentration. No energy needed.

movement water from high to low concentration.

movement of molecules from low concentration to high concentration. Takes energy

SEMI-PERMEABLE (selectively permeable membrane)

is a membrane which will allow some things to pass through based on size.

is a thin material that separates two areas

is the part of the cell that covers the cell. It is selectively permeable

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Diffusion

Question	Answer
CONCENTRATION	how much of something in an area
DIFFUSION	movement of molecules from high to low concentration. No energy needed.
OSMOSIS	movement water from high to low concentration.
ACTIVE TRANSPORT	movement of molecules from low concentration to high concentration. Takes energy
SEMI-PERMEABLE (selectively permeable membrane)	is a membrane which will allow some things to pass through based on size.
MEMBRANE	is a thin material that separates two areas
CELL MEMBRANE	is the part of the cell that covers the cell. It is selectively permeable