8.3 & 8.4 Test

Diffusion occurs because

• molecules are attracted to one another
• molecules constantly move and collide with each other
• cellular energy forces molecules to collide with each other

Tags

NGSS.MS-PS1-2

During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will

• move across the membrane to the outside of the cell
• stop moving across the membrane
• continue to move across the membrane in both directions

Tags

NGSS.MS-LS2-3

The image below displays a cell membrane. What is the cell membrane composed of?

• lipid bilayer
• fat trilayer
• lipid layer

Tags

NGSS.MS-LS1-2

The diffusion of water across a selectively permeable membrane is called

• osmotic pressure
• osmosis
• pinocytosis

Diffusion will continue to occur until ______________ is reached.

• equilibrium
• homeostasis
• equity

An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes

• water to move into the cell
• water to move out of the cell
• solutes to move into the cell

What advantages do cell walls provide plant cells that contact fresh water?

• provides little protection
• provides flexibility and protection
• provides flexibility and color

Which means of particle transport is shown in the figure?

• diffusion
• osmosis
• active transport

Why does active transport require energy?

• because molecules move from HIGH concentration to LOW concentration
• because molecules somehow have to move into the cell
• because molecules move from LOW concentration to HIGH concentration

Tags

NGSS.MS-PS3-5

Pick all that apply to passive transport:

• osmosis
• diffusion
• doesn't require energy
• molecules move from LOW concentration to HIGH concentration