Movement of molecules

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9 Terms

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Diffusion

Movement of molecules from high concentration to low concentration

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Osmosis

Movement of water across selectively permeable membrane

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Concentration

The amount of a substance in a given space or volume

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Concentration gradient

The difference in concentration between two areas

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Solute

A substance dissolved in a liquid, such as salt or sugar

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Solvent

A liquid that dissolves a solute, such as water

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Solution

A mixture of a solute and a solvent

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Selectively permeable membrane

A membrance that allows certain substances to pass through but not others

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Equilibrium

When concentrations become balanced and there is no net movement