Photosynthesis

• What is the main function of the cell wall?

  It provides structure and protection to the cell.
• What is osmosis?


  Osmosis is the movement of water across a semi-permeable membrane from a less concentrated solution to a more concentrated solution.
• What are the products of photosynthesis?


  • Oxygen
  • Glucose (stored as starch)
• How can you test for starch in a leaf?


  You can drop iodine on the leaf; if it turns blue-black, starch is present.
• Why would a leaf covered with aluminum foil not produce starch?


  Because it would not receive light energy necessary for photosynthesis.
• What factors were investigated in the photosynthesis experiment?


  • Light availability
  • Presence of chlorophyll
  • Starch production
• What is the independent variable in the gardener's experiment comparing normal and variegated plants?


  The type of plant (normal or variegated).
• What is the dependent variable in the gardener's experiment?


  The growth of the plant (height).
• What are the controlled variables in the gardener's experiment?


  The same conditions such as amount of water and sunlight.
• How would you calculate the growth of the plants in the experiment?


  By measuring the height of each plant at the start and end, then subtracting the initial height from the final height.
• How can you demonstrate the difference in growth between normal and variegated plants over six weeks?


  • Measure the height of both plants at the start and end of the experiment.
  • Record the data and compare the growth rates.