Test

• What is active transport?

  The movement of particles from a low concentration to a high concentration
• What does active transport require?

  Energy released from respiration
• Why would water move into a potato placed in distilled water?

  The concentration of water is higher outside the potato than inside
• What would make water enter the potato slowly?

  The difference in concentration is small
• Why would water move out of a potato placed in a concentrated solution?

  The concentration of water is higher inside the potato than outside
• How can you investigate the effect of salt concentration on the movement of water in a vegetable?

  • Use 5 different salt concentrations
  • Measure the start mass of the vegetable
  • Place in the solution for 24 hours
  • Measure the end mass of the vegetable
  • Calculate the change in mass and the % change in mass
• Give 3 examples of diffusion in the body.

  Oxygen, carbon dioxide, and nutrients
• What is diffusion?

  The movement of particles from an area of high concentration to an area of low concentration
• State three factors which affect the rate of diffusion.

  Temperature, concentration gradient, and surface area
• Why do large organisms need transport systems?

  They have a larger surface area to volume ratio
• Define osmosis.

  The movement of water across a semi-permeable membrane from a dilute to a concentrated solution
• What does dilute mean?

  A solution with a low concentration of solute
• Why can single-celled organisms use diffusion for transporting molecules?

  They have a large surface area relative to their volume
• Why don't plant cells burst?

  They have a rigid cell wall that prevents bursting
• What will happen to a cell placed in a concentrated solution?

  The cell shrinks
• What will happen to a cell placed in a dilute (0.0M) solution?

  The cell swells
• How is change calculated?

  Change = (final value - initial value) / initial value × 100
• How do you work out the concentration of solution inside the vegetable?

  Plot the change in mass and the salt concentration on a graph
• What literary work is discussed in the study material?

  Dr. Jekyll and Mr. Hyde
• What is the primary emotion that Stevenson aims to evoke in "Dr. Jekyll and Mr. Hyde"?

  A sense of fear
• What are the techniques Stevenson uses to create fear in "Dr. Jekyll and Mr. Hyde"?

  1. Atmospheric Descriptions
  2. Characterization of Hyde
  3. Themes of Duality
  4. Suspense and Mystery
  5. Violence and Horror
• How does Stevenson use atmospheric descriptions to create fear?

  He sets a gloomy and foreboding atmosphere with detailed imagery of London.
• What effect does the setting of London have on the story?

  It creates an eerie and unsettling mood that mirrors the characters' internal chaos.
• How is Mr. Hyde characterized in the story?

  He is described as having a deformed and displeasing appearance.
• What is the significance of Hyde's violent actions?

  They enhance the fear he instills in others and contribute to the overall terror.
• How does the contrast between Jekyll and Hyde contribute to the story's horror?

  It emphasizes the disturbing duality of human nature.
• What theme does Stevenson explore through Jekyll's experiments?

  The theme of duality, highlighting the good and evil within every person.
• How does Stevenson build suspense in the narrative structure?

  By gradually revealing the truth about Jekyll and Hyde through multiple perspectives.
• What shocking act of violence is mentioned in the study material?

  The murder of Sir Danvers Carew.
• What central fear does the story address regarding human nature?

  The fear of the unknown and uncontrollable aspects of human nature.
• How does Jekyll's inability to control his transformations contribute to the story's tension?

  It creates a sense of impending doom and unpredictability.
• What elements together build a pervasive sense of fear in "Dr. Jekyll and Mr. Hyde"?

  • Atmospheric descriptions
  • Characterization of Hyde
  • Themes of duality
  • Suspense and mystery
  • Violence and horror