osmosis and diffusion Review

What is diffusion?

• when molecules move from a low concentration to a high concentration 
• when molecules move from a high concentration to a low concentration.
• no movement 
• molecules move everywhere

Tags

NGSS.MS-PS1-4

Where is there a high concentration of water?

• in the flower
• cannot be determined by picture.
• in the vase
• in the leaves

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

Where is there a high concentration of bbq smoke?

• In the bbq pit
• In the house
• Two streets over
• In the atmosphere

When a person smells something, what is actually traveling up their nose?

• solids 
• molecules 
• matter
• plasma 

Tags

NGSS.MS-LS1-8

NGSS.MS-PS1-1

What is the definition of  Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.
  
• The movement of materials through (or across) the cell membrane
  
• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
• The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
  

Tags

NGSS.MS-LS1-2

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Tags

NGSS.MS-LS1-3

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Tags

NGSS.MS-LS2-1

What is the definition of Osmosis?

• the movement of WATER molecules across the cell membrane.
  
• the state where molecules are equally concentrated (balanced) on both sides of the cell membrane.
  
• the process that brings LARGE particles INTO the cell through the cell membrane
  
• he movement of molecules across the cell membrane that REQUIRES ENERGY output from the cell
  

What is the definition of Equilibrium?

• the process that brings LARGE particles INTO the cell through the cell membrane
  
• The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
  
• the state where molecules are equally concentrated (balanced) on both sides of the cell membrane.
  
• the movement of WATER molecules across the cell membrane.
  

How many diamond molecules need to move to reach equilibrium?

• A net of 2 molecules move inside the cell.
• A net of 2 molecules move outside the cell.
• There is no net movement because the molecules are at equilibrium.
• The molecules do not move.

Tags

NGSS.HS-PS1-6