____ is the spreading of a substance due to the ____ movement of molecules. ____ water diffuses ____ because its molecules moves faster; ____ water diffuses ____ because its molecules moves slower. Molecules with a ____ mass diffuses slower compared to molecules of a ____ mass. This is because larger mass requires ____ energy to move faster. ____ is the movement of molecules from an area of its ____ concentration to an area of its ____ concentration, through a semi-permeable membrane. The ____ the concentration difference, the faster the rate of osmosis. Osmosis stops when the concentration on both sides of the semi-permeable membrane is ____.Only molecules ____ then the pores (holes) of the semi-permeable membrane can cross the membrane.

Diffusion and Osmosis

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