diffusion

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

  Diffusion
• What is diffusion?

  Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
• How do molecules behave when left alone?

  They move about randomly.
• What happens to a group of molecules that are bunched up together over time?

  They will slowly spread out due to their random motion.
• What do we call the process of molecules spreading out?

  Diffusion
• What does the term "net movement" refer to in diffusion?

  It refers to the movement of all particles considered together as a group.
• In what states of matter can diffusion occur?

  Diffusion can happen in both gases and liquids.
• How does perfume demonstrate diffusion?

  Perfume quickly diffuses across the whole room so it can be smelled everywhere.
• What happens when food coloring is added to water?

  It diffuses through the water until the whole glass is the same color.
• What is a partially permeable membrane?

  A membrane that allows only some molecules to diffuse through it.
• Which types of molecules can generally diffuse through cell membranes?

  Very small molecules like water, glucose, and amino acids.
• Why can't larger molecules diffuse through the cell membrane?

  Because they are too big to fit through the membrane.
• What type of process is diffusion?

  It is a passive process.
• What does it mean that diffusion is a passive process?

  It means that it doesn't require any 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?

  The larger the concentration gradient, the higher the rate of diffusion.
• What is the second factor that affects the rate of diffusion?

  Temperature.
• How does temperature influence the rate of diffusion?

  Higher temperatures give particles more energy, causing them to move faster and diffuse more quickly.
• What is the third factor that affects the rate of diffusion?

  Surface area.
• How does surface area affect the rate of diffusion?

  The larger the surface area, the higher the rate of diffusion.
• Why does a larger surface area increase the rate of diffusion?

  More particles can fit around the surface, allowing more particles to diffuse in and out at once.
• What are the three factors that affect the rate of diffusion?

  • Concentration gradient
  • Temperature
  • Surface area
• What is the definition of diffusion?

  • The net movement of particles from an area of higher concentration to an area of lower concentration.
• What is the significance of diffusion in biological systems?

  • Essential for processes like gas exchange and nutrient absorption.
• What is an example of diffusion in everyday life?

  • The spreading of perfume in a room or food coloring in water.
• What is the role of partially permeable membranes in diffusion?

  • They allow only certain molecules to diffuse, regulating what enters and exits cells.