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2.8: Diffusion

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

TermDefinition
concentration Amount of a substance in relation to the total volume.
concentration gradient Gradual difference in the concentration of substances between two regions.
diffusion Movement of molecules from an area where there is a higher concentration (larger amount) of the substance to an area where there is a lower concentration (lower amount) of the substance.
equilibrium State in which the concentrations of the diffusing substance are the same or become equal.
hypertonic solution Environment (solution) outside of the cell has more dissolved material than the inside of the cell.
hypotonic solution Environment (solution) outside of the cell has a lower concentration of dissolved material than the inside of the cell.
isotonic solution Amount of dissolved material is equal, both inside and outside of the cell.
osmosis Diffusion of water across a membrane.

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Description
Difficulty Level:
At Grade

Concept Nodes:

Grades:
7 , 8
Date Created:
Nov 29, 2012
Last Modified:
Aug 30, 2016
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