Microscopes

Question 1

Why is it a conventional unit of measurement?

Answer 1

Too large to measure

Question 2

What is the unit of measurement?

Answer 2

Microns

Question 3

How many microns in 1mm?

Answer 3

1000 microns

Question 4

Define micrograph

Answer 4

Photograph of a specimen viewed under microscope

Question 5

What does one measure cell in?

Answer 5

Milimetre

Question 6

How do you convert mm into microns?

Answer 6

times by 1000

Question 7

How do you convert microns into mm?

Answer 7

divide by 1000

Question 8

Define microscope

Answer 8

Instrument that uses a lens or combination of lenses to produce magnified images of small objects

Question 9

What does the microscope allow you to do?

Answer 9

Look at small things with the naked eye

Question 10

Define magnifying lens

Answer 10

A piece of glass that is specifically curved to produce an enlarge image of object

Question 11

What is a compound microscope?

Answer 11

More than one lens and light to view specimen

Question 12

What is a electron microscope?

Answer 12

Beams of electrons

Question 13

Define ocular lens

Answer 13

Lens that you look through to view enlarged object

Question 14

What is another name for ocular lens?

Answer 14

eyepiece

Question 15

How much does the ocular lens magnify by?

Answer 15

10x

Question 16

What is the body tube?

Answer 16

Lens that magnify object. Passes light from head to eyepiece

Question 17

What is the rotating head?

Answer 17

Contains mirrors, allows body tube to rotate 360 degrees

Question 18

What is the rotating nosepiece?

Answer 18

Structure that rotates. One of three different lens to view specimen

Question 19

Define objective lens

Answer 19

Lens closest to specimen

Question 19

Define objective lens

Answer 19

Lens closest to specimen

Question 20

How many objective lens are there?

Answer 20

Three that are attached to rotating nosepiece

Question 21

Label the three objective lens

Answer 21

1. Low magnification (red) 40X
2. Medium magnification (yellow) 10X
3. High magnification (Blue) 4X 

Question 22

Which lens produces the most magnification?

Answer 22

Objective lens

Question 23

Define stage clamp/clip

Answer 23

Holds down the microscope slide into olace

Question 24

What is the diaphragm?

Answer 24

Adjust amount of might passing through microscope

Question 25

What type of dial is on the diaphragm?

Answer 25

Rotating and number dials

Question 26

What are number dials?

Answer 26

Relative amount of light passing

Question 27

What is the number for the highest light passing?

Answer 27

5

Question 28

What is the number for the lowest light passing?

Answer 28

1

Question 29

What is the condenser?

Answer 29

Focuses light into specimen. Condenses light

Question 30

What is the mirror?

Answer 30

Directs light up - light source illuminated

Question 31

What is the base?

Answer 31

Support lenses and stage. Supports microscopes which contain electronics

Question 32

Define stage

Answer 32

Platform slide is place on

Question 33

What does the stage contain?

Answer 33

Opening

Question 34

What is the opening on the stage used for?

Answer 34

Allow light to pass through specimen

Question 35

What is the arm?

Answer 35

Supports the lenses, mirrors and body tube

Question 36

What does the arm connect?

Answer 36

Body tube to base

Question 37

How do you carry the microscope?

Answer 37

One hand on arm and one on bade

Question 38

What does turning the fine focusing knob do?

Answer 38

Changes distance between stage and objective lens

Question 39

How fast should you make focus adjustments in the fine focusing knob?

Answer 39

Slowly

Question 40

What type of objective is the fine focusing knob?

Answer 40

High power objective

Question 41

What is the coarse fixing knob?

Answer 41

Trying knob changes distance between stage and objective lens quicjly

Question 42

What type of focus is the fine focus knob?

Answer 42

Clear focus

Question 43

What type of focus is the coarse focus knob?

Answer 43

Rich focus

Question 44

What type of power objective is the coarse focus knob?

Answer 44

Low power objective

Question 45

Define wet mouth slide

Answer 45

Glass slide holding a specimen suspended in a drop of water and with a cover slip

Question 46

How is the specimen seen on microscope?

Answer 46

Specimen placed in a drip of liquid on microscope slide

Question 47

What is the liquid used on a slide?

Answer 47

Water

Question 48

What may be added to water?

Answer 48

Dye

Question 49

Why would dye be added to water?

Answer 49

Stain cells/part to be visible

Question 50

Formula magnification of specimen

Answer 50

Magnification if ocular lens X magnification of objective lens

Question 51

Formula for actual size of cell

Answer 51

Measure length X 1000 divide by given magnification