Required practical - Using light microscope (AQA GCSE Biology Combined Science): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
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Practise the cards
10 cards from this deck
Purpose of iodine solution in microscope work
Purpose of iodine solution in microscope work
Stains cells to make structures more visible
Why onion skin works well for this practical
Why onion skin works well for this practical
Peels easily in single layers of cells
Tool used to peel onion layer
Tool used to peel onion layer
Forceps
Correct coverslip placement technique
Correct coverslip placement technique
Place one edge down at 45°, then gently lower the other edge
Location to place slide on microscope
Location to place slide on microscope
On the stage (secured with clips)
Starting objective lens power setting
Starting objective lens power setting
Lowest power setting
Focusing wheel order when observing specimen
Focusing wheel order when observing specimen
Coarse focusing wheel first, then fine focusing wheel
Reason to start with low power objective
Reason to start with low power objective
Makes it easier to find and focus on specimen
Eyepiece on a microscope
Eyepiece on a microscope
The lens you look through at the top
Key safety precaution with iodine solution
Key safety precaution with iodine solution
Wear eye protection