Osmosis & Diffusion Flip Flaps Science Interactive Notebook

Activity !

By: Jessica Smith

Osmosis

Diffusion

Active Transport

Passive Transport

Osmosis - Diffusion of water molecules through a selectively

permeable membrane. -Cells need water to perform functions properly.

-Water helps “plump up” cells. -Without water, cells would shrink and die. !

Diffusion - Small molecules move through cell membrane. - Cell membrane is selectively permeable (allowing certain particles in

while keeping others out). - Molecules move from a higher concentration to a lower concentration.

Active Transport

- Molecules pass through membrane USING cell’s energy. - Cells use transport proteins to move molecules. OR - Cell membrane engulfs or “swallows up” the molecule.

Passive Transport

- Molecules pass through membrane WITHOUT using cell’s energy. - Diffusion & osmosis use passive transport. - Passive = “lazy” transport.

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