Diffusion

• What is the main topic of today's video?

  Diffusion
• What is diffusion?

  Net movement of particles from high to low concentration
• What happens to molecules over time if left alone?

  They spread out due to random motion
• What is meant by 'net movement' in diffusion?

  Movement of all particles considered as a group
• In which states of matter can diffusion occur?

  Both gases and liquids
• How does perfume demonstrate diffusion?

  It spreads quickly across the room
• What happens when food coloring is added to water?

  It diffuses until the water is uniform
• What is a partially permeable membrane?

  A membrane allowing only some molecules to pass
• Which types of molecules can generally diffuse through cell membranes?

  Small molecules like water and glucose
• What type of process is diffusion?

  Passive process requiring no energy
• Why can't larger molecules diffuse through cell membranes?

  They are too big to fit through
• What is the concentration gradient?

  Difference in concentration between two places
• How does a larger concentration gradient affect diffusion?

  It increases the rate of diffusion
• How does temperature affect the rate of diffusion?

  Higher temperatures increase particle movement
• What is the effect of a larger surface area on diffusion?

  It increases the rate of diffusion
• What are the three factors that affect the rate of diffusion?

  • Concentration gradient
  • Temperature
  • Surface area
• Why does a larger surface area lead to a higher rate of diffusion?

  More particles can diffuse at once
• What should you do if you found the video helpful?

  Tell friends and teachers or subscribe