Diffusion and Osmosis

Diffusion is the movement of particles from a __________ to a ___________ concentration.

• Higher. Lower.

• Lower.Higher.

Osmosis is the movement of ________ molecules from a ___________ to a _____________ solution across a partially permeable membrane. (type the 3 words below each separated by a space)

A high concentration gradient results in a __________ rate of diffusion/osmosis.

• faster

• slower

• unchanged

A membrane that lets smaller molecules pass through by not larger molecules is said to be ____________ ______________. (2 words)

A solution that has a high concentration of water is said to be __________.

A concentrated solution has a __________ concentration of ____________________.

• High. Dissolved substances.

• Low. Dissolved substances.

• High. Water.

A ________ surface area to volume ratio results in __________ diffusion.

• large

• small

• faster

From fastest to slowest rate of diffusion, which of the following is in the correct sequence?

• Solids, liquids, gases

• Liquids, gases, solids

• Gases, liquids, solids

• Gases, solids, liquids

How does distance affect diffusion?

• Shorter the distance the faster the rate
• The bigger the distance the faster the rate
• It doesn't matter - molecules will always diffuse at the same rate

How does increasing temperature affect the rate of diffusion?

• Increases enzyme activity increasing the rate
• Gives molecules more energy increasing the rate
• Takes energy away from molecules slowing down the rate
• Decreases enzyme activity and decreases the rate

Tags

NGSS.HS-PS1-5