1: Light Microscopes and Drawing Skills Flashcards Preview

IB Biology SL > 1: Light Microscopes and Drawing Skills > Flashcards

Flashcards in 1: Light Microscopes and Drawing Skills Deck (9)
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1
Q

Draw and label a light microscope. (p4)

A
  1. eye piece
  2. nose piece
  3. objective lens
  4. stage
  5. condenser lens and diaphragm
  6. coarse focusing knob
  7. fine focusing knob
  8. lamp
2
Q

There are 11 steps to follow when using light microscopes. If you can be fucked to learn them good for you, but I can’t.

A

It starts like this:

  1. treat the specimen with a stain that makes parts of the cells of the specimen available….
3
Q

Why were microscopes invented?

A
  1. to investigate the structure of cells and tissues
4
Q

What has a higher capacity for magnification: a light microscope or an electron microscope?

A
  1. an electron microscope gives a higher magnification
5
Q

What do you call a photograph taken down a microscope? How else could you record what you see?

A
  1. a micrograph

2. by drawing it

6
Q

How to calculate magnification of a micrograph or drawing.

A
  1. magnifcation = size of image / size of specimen

make sure your units are the same when you divide

7
Q

What is a scale bar?

A
  1. a line added to a micrograph or a drawing to help to show the actual size of the structure
8
Q

What is the relationship between millimeters (mm), micrometers (um) and nanometers (nm)?

A

1 mm
= 1,000 um
= 1,000,000 nm

9
Q

A micrometer (um) is the smallest S.I size unit you will see on a scale bar. True/False?

A
  1. False

2. a nanometer (nm) is x1000 smaller than a micrometer

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