year 9 osmosis (simple)

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

  The video covers osmosis, water concentration, and their application to cells.
• What is diffusion?


  Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.
• How do oxygen and glucose molecules move into a cell?

  They diffuse down their concentration gradient into the cell.
• What is osmosis?


  Osmosis is the net movement of water molecules across a partially permeable membrane from a region of higher water concentration to a region of lower water concentration.
• What does the term "water concentration" refer to?

  Water concentration refers to the amount of water compared to other dissolved molecules like sugars or salts.
• What are solutes?


  Solutes are the molecules like sugars or salts that are dissolved in water.
• How does the concentration of solutes affect water concentration in a solution?

  • Higher solute concentration means lower water concentration.
  • Lower solute concentration means higher water concentration.
  • It's the proportion of water to solutes that determines concentration, not the volume of water.
• In the example with two beakers, which beaker has a higher concentration of solutes?

  The beaker with three particles of solute has a higher concentration of solutes than the one with one particle.
• What happens to water molecules when there is a difference in water concentration between the inside and outside of a cell?

  Water molecules will diffuse from the area of higher water concentration to the area of lower water concentration.
• What is the role of the cell's partially permeable membrane in osmosis?

  The partially permeable membrane allows water molecules to pass while restricting the movement of solute particles.
• What is the process of osmosis in relation to cells?

  • Water moves from outside the cell (higher water concentration) to inside the cell (lower water concentration).
  • This movement occurs through the cell's partially permeable membrane.
  • It is driven by the concentration gradient of water.
• What does the video suggest for those not confident with diffusion?


  It recommends watching the previous video on diffusion before continuing.
• What resources does the video creator offer for further learning?

  • A learning platform with videos and practice questions.
  • A link to the lesson in the video description.
  • A playlist of videos for the subject.