Diffusion is the natural movement of molecules from:

• Areas of low concentration to areas of high concentration

• Areas of high concentration to areas of low concentration

• Cold to hot environments

• Gaseous to liquid environments

What happens to the coffee particles when coffee is added to hot water?

• They sink to the bottom of the cup

• They spread out

• They clump together

• They freeze

Diffusion is the movement of particles from an area of _____ concentration to an area of ______ concentration

• High, Low

• Low, High

• Low, Low

• High, High

What is the definition of diffusion?

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

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

In which direction does diffusion occur, from high to low concentrations or from low to high concentrations?

• from low to high concentrations

• from high to low concentrations

• in both directions simultaneously

• it does not occur

What impact does temperature have on the rate of diffusion?

• Temperature has no impact on the rate of diffusion.

• Temperature decreases the rate of diffusion.

• Temperature increases the rate of diffusion.

Diffusion is the movement of particles from an area of _____ concentration to an area of ______ concentration

• High, Low

• Low, High

• Low, Low

• High, High

What does “area of high concentration” mean?

• Spread out

• Tightly packed together

• Uncrowded

• Spacious

An increase in temperature does what to diffusion?

• Speeds it up

• Slows it down

• Nothing

• Stops it all together

When do molecules stop moving or vibrating?

• When equilibrium is reached

• Never

• When the temperature is below 0 degrees Celsius

• When the substance they are part of becomes a solid