Diffusion

Diffusion

Monday 1st February 2021

Diffusion

• Particles in a gas or a liquid are constantly moving.

• Because of this, the particles will try to spread themselves out evenly throughout the gas or liquid.

• If liquid/gas particles are 'bunched together', they will try to spread out and fill the space that they are in.

• This is called diffusion.

Multiple Choice

TRUE OR FALSE? Diffusion occurs in solids, liquids and gases.

• TRUE

• FALSE

Diffusion

The movement of particles from a region of high concentration to an area of low concentration.

The particles will do this until they are evenly spread out (although they will still move around).

This is a passive process and does not require any energy!

Multiple Choice

What words should fill the gaps? Diffusion is a process by which gas or liquid particles will move from an area of _______ concentration to an area of ______ concentration.

• low, high

• high, low

• high, balanced

Factors affecting diffusion

• Temperature

• Concentration gradient

• Surface area

Multiple Choice

Which factor will decrease the rate of diffusion across from the alveoli and into the blood?

• Decreasing the temperature

• Increasing the differences in concentration

• Increasing the surface area of the alveoli