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 the definition of net movement in diffusion?

  Movement of all particles considered together
• In what states of matter can diffusion occur?

  Both gases and liquids
• What happens when you spray perfume in a room?

  It diffuses across the whole room
• What occurs when food coloring is added to water?

  It diffuses until the water is the same color
• What type of membranes allow diffusion of some molecules?

  Partially permeable membranes
• Which molecules can generally diffuse through cell membranes?

  Small molecules like water and glucose
• Why is diffusion considered a passive process?

  It doesn't require energy from the cell
• What is the first factor that affects the rate of diffusion?

  The concentration gradient
• How does a larger concentration gradient affect diffusion?

  It increases the rate of diffusion
• What effect does temperature have on diffusion?

  Higher temperatures increase the rate of diffusion
• How does surface area influence the rate of diffusion?

  Larger surface area increases the rate of diffusion
• What are the three factors that affect the rate of diffusion?

  • Concentration gradient
  • Temperature
  • Surface area
• How does a larger surface area facilitate diffusion?

  • More particles can fit around the surface
  • More particles can diffuse in and out simultaneously