Core Practical: Drawing specimen from microscope (Edexcel GCSE Biology): Flashcards
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12 cards from this deck
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Practise the cards
12 cards from this deck
Definition of resolution in microscopy
Definition of resolution in microscopy
How well a microscope distinguishes 2 points close together
Tool used to measure cell size in microscope
Tool used to measure cell size in microscope
Eyepiece graticule
What calibrates the eyepiece graticule?
What calibrates the eyepiece graticule?
Stage micrometer
Formula for cell size using graticule
Formula for cell size using graticule
(in )
How to calculate total magnification
How to calculate total magnification
Eyepiece magnification objective lens magnification
Which objective lens to start with?
Which objective lens to start with?
Lowest-powered objective lens
Drawing guidelines for microscope specimens
Drawing guidelines for microscope specimens
Sharp pencils, smooth lines, no shading, label features
Purpose of low-power magnification (e.g. )
Purpose of low-power magnification (e.g. )
Broad view of tissue and general arrangement of cells
Purpose of high-power magnification (e.g. )
Purpose of high-power magnification (e.g. )
Observe individual cells in detail
Why add stain to transparent specimens?
Why add stain to transparent specimens?
Makes them easier to see
What to include on your microscope drawing?
What to include on your microscope drawing?
Magnification, scale bar, labels of features
Function of coarse adjustment knob
Function of coarse adjustment knob
Move stage up/down to bring specimen into focus