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Getting ready

Getting ready. Sit in seat Get analogy out for OK to do lab. Those not doing lab will work on analogy. No candy or gum! Set up notebook on front board!. Slide – the letter ‘e’. Set up microscope – turn on Cut out small ‘e’ from newsprint. Place on slide

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Getting ready

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  1. Getting ready • Sit in seat • Get analogy out for OK to do lab. • Those not doing lab will work on analogy. • No candy or gum! • Set up notebook on front board!

  2. Slide – the letter ‘e’ • Set up microscope – turn on • Cut out small ‘e’ from newsprint. Place on slide • Put 1 drop H2O on ‘e’. Place cover slip over ‘e’. • Put on stage. Use low power only. • Answer questions on following slide in your notebook.

  3. Draw ‘e’ • If ‘e’ is in the position shown above, how does it appear in the eyepiece? • Draw ‘e’ as it appears in the box below!

  4. Looking at ‘e’ • While looking at ‘e’ through eyepiece, if you move slide to the right, how does it appear to move? • While looking at ‘e’ through the eyepiece, if you move the slide up, how does it appear to move? • Both lab partners need to do this!

  5. Make onion slide • New slide – tear a paper thin piece of onion off – it should be translucent – and place it on the slide using toothpicks. Your piece should not be bigger than half of your cover slip. • Place 1-2 drops of iodine on slide. Wait 15 seconds and cover with a cover slip. • View on low power– draw • Center slide on a section with few water marks and clear cells. • Focus on medium power – draw • Focus on high power – draw.

  6. Onion on low magnification • What cell features can you see?

  7. Onion on medium magnification • What cell features are now visible?

  8. Onion on high magnification • How is high magnification different for the onion slide than low magnification?

  9. Clean up • Return materials back to containers as you found them. • Wash and dry slide – return to container 3. Throw any paper towels away – clean up area. 4. Work on analogy – Study for test Friday.

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