Diffusion

Front

What is diffusion?

Back

Diffusion is the natural movement of molecules from areas of high concentration to areas of low concentration.

Front

What causes diffusion to occur?

Back

Diffusion occurs due to the constant, random motion of molecules.

Front

How does temperature affect the rate of diffusion?

Back

Higher temperatures increase the energy and movement of molecules, leading to a faster rate of diffusion.

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NGSS.MS-PS1-4

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

Front

What does it mean for a system to reach equilibrium?

Back

A system reaches equilibrium when the concentration of a substance is uniform throughout, meaning there is no net movement of molecules.

Front

Why is diffusion important in biological systems?

Back

Diffusion is crucial in biology because it allows substances to move across cell membranes, facilitating essential processes like respiration and nutrient uptake.

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NGSS.MS-LS1-2

NGSS.MS-LS2-3

Front

What is an example of diffusion in everyday life?

Back

An example of diffusion is the way warm air from a radiator spreads throughout a room.

Tags

NGSS.MS-PS1-4

Front

What role do cell membranes play in diffusion?

Back

Cell membranes are selectively permeable, allowing certain substances to diffuse in and out of the cell while blocking others.

Tags

NGSS.MS-LS1-2

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process where molecules pass through the cell membrane via specific transport proteins, without the use of energy.

Front

How does diffusion differ from osmosis?

Back

Diffusion refers to the movement of any molecules from high to low concentration, while osmosis specifically refers to the movement of water molecules across a semipermeable membrane.