Understanding Diffusion

What is the primary driving force behind diffusion?

• Pressure

• Concentration gradient

• Temperature

• Gravity

In the trash can example, what happens when the lid is opened?

• The stink molecules remain inside the can

• The stink molecules move to an area of lower concentration

• The stink molecules increase in concentration inside the can

• The stink molecules disappear

What does the green circle represent in the trash can example?

• Stink molecules

• Air molecules

• Water molecules

• Sugar molecules

In the lemonade example, which side of the glass would taste sweeter initially?

• Neither side is sweet

• Both sides taste the same

• Side B

• Side A

What is the result of diffusion in the lemonade example after the barrier is removed?

• An equal distribution of sugar and water molecules

• The water molecules stay on one side

• The sugar molecules stay on one side

• The sugar and water molecules disappear