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1 p9 onion cells 291110
1 p9 onion cells 291110
1 p9 onion cells 291110
1 p9 onion cells 291110
1 p9 onion cells 291110
1 p9 onion cells 291110
1 p9 onion cells 291110
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1 p9 onion cells 291110

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Transcript

  • 1. Onion cells 1P9: Monday 29th November
  • 2. Onion cells • AIM: To prepare an onion slide and view under a microscope • Watch the demonstration – then prepare your own slides and view under the microscope!
  • 3. Preparing onion cells 1. Collect a thin piece of onion skin 2. Using a pair of tweezers and a dissecting needle, place it as flat as possible on the glass slide 3. Place a drop of stain on the top 4. Carefully lower a coverslip using a dissecting needle 5. Carefully dry off any excess stain 6. View under the microscope
  • 4. In your notebooks… • Write up your method • Draw what you see in the microscope your notebook – label your diagram!
  • 5. Preparing cheek cells 1. Scrape the inside of your cheek gently with your finger 2. Dab this onto the glass slide 3. Place a drop of stain on the top 4. Carefully lower a coverslip using a dissecting needle 5. Carefully dry off any excess stain 6. View under the microscope
  • 6. THE LIGHT MICROSCOPE Eyepiece Objective Lenses Stage Mirror Stand Clips Focus Control
  • 7. THE LIGHT MICROSCOPE Eyepiece Objective Lenses Stage Mirror Stand Clips Focus Control

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