If you want to look at a specimen under a light microscope, you need to put it on a microscope slide first. What is a slide?
A piece of clear glass or plastic onto which the specimen is mounted.
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You first add a drop of...to the middle of a clear slide.
Water.
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Cut up and seperate onion into layers. Use tweezers to peel off some...from the bottom of one of the layers.
Epidermal tissue.
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using tweezers, place epidermal tissue into the...on the slide.
Water.
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Add a drop of... This is a stain. Stains are used to highlight objects in a cell by adding colour to them.
Iodine solution.
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Place a cover slip on top. Don't get any air bubbles under there, why?
They'll obstruct your view of the specimen.
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To look at your slide you need to use a light microscope: Clip the slide you've prepared onto the stage, select the...objective lens and use the...adjustment knob to move the stage up to just below the objective lens.
lowest-powered...Coarse.
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Look down the... Use the coarse adjustment knob to move the stage downwards until the image is roughly in focus.
Eyepiece.
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Adjust the focus with the...until you get clear image of what's on slide.
Fine adjustment knob.
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Draw what you see using a...with a...point.
Penicil. Sharp.
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The drawing shouldn't include colouring or shading, include a...,... the important feautures and write down the...
Title, label and magnification
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Exam Question: Why might you add stain to the sample on a microscope slide? [1 mark].
To highlight objects within the sample by adding colour to them. [1 mark].
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Other cards in this set
Card 2
Front
You first add a drop of...to the middle of a clear slide.
Back
Water.
Card 3
Front
Cut up and seperate onion into layers. Use tweezers to peel off some...from the bottom of one of the layers.
Back
Card 4
Front
using tweezers, place epidermal tissue into the...on the slide.
Back
Card 5
Front
Add a drop of... This is a stain. Stains are used to highlight objects in a cell by adding colour to them.
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