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2.8: Diffusion

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

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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Difficulty Level:
At Grade

Concept Nodes:

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