Diffusion and Osmosis

What is diffusion?

• when molecules move from a region of high water potential to a region of low water potential through a partially permeable membrane

• net movement of molecules from a region of high concentration to a region of low concentration until equilibrium is reached

• no movement

• the constant and random movement of molecules

Where is there a low concentration of dye?

• at the bottom of the cup

• in the coloured dye

• at the top of the cup

  
  

• no concentration gradient so there is equal concentration throughout the cup

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

  
  

What is the SA: VR of this cube (Surface area to volume ratio)

PS. y'all said you understand 👀

• 2:1

• 3:1

• 6:1

• 4:1

What does a 'region with high concentration' mean?

• An area with a SMALL number of particles

  
  

• An area with a LARGE number of particles

  
  

• An area with an UNEVEN number of particles

  
  

• An area with no particles

•The steeper the concentration gradient, the higher the rate of diffusion.

• True

• False

Does Increasing surface area to volume ratio, mean higher absorption rate?

• YES

• NO

What is the significance of the concentration gradient in diffusion?

• It has no effect on the rate of diffusion

• It determines the direction and rate of diffusion

• It only affects the direction of diffusion