Diffusion

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What happens to the particles in a substance when it is heated?

Back

The particles speed up and spread out.

Front

Does diffusion occur in solids?

Back

No, diffusion primarily occurs in liquids and gases.

Front

What is a concentration gradient?

Back

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

Front

What direction does oxygen move if there is more oxygen in the blood than in an organ?

Back

Oxygen moves out of the blood into the organ.

Front

What happens to the liquid in a thermometer when it is placed in hot water?

Back

The liquid gains heat from the hot water and expands.

Front

Where is there a low concentration of dye in a cup of water?

Back

At the bottom of the cup.

Front

What is the effect of temperature on the rate of diffusion?

Back

Higher temperatures increase the rate of diffusion because particles move faster.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane.

Front

What is the difference between diffusion and active transport?

Back

Diffusion is a passive process that does not require energy, while active transport requires energy to move substances against their concentration gradient.