Microscopes

• Optical microscope


  Used to look at cells on a prepared microscope slide
• What can be seen under an optical microscope

  • Animal cells: nucleus, cytoplasm, cell membrane, possible mitochondria
  • Plant cells: cell wall, cytoplasm, nucleus, possible vacuole and chloroplasts
• 1. Cut an onion into pieces using a sharp knife.
  2. Peel off a thin layer of cells from one piece.
  3. Place the layer of cells onto a microscope slide.
  4. Add three drops of iodine solution to the layer of cells to stain so it is visible
  5. Cover with a cover slip.
  6. Place the slide on the stage of the microscope.carefully avoid air bubbies