bio microscope test

Question 1

how do you carry a microscope

Answer 1

in an up right position, one hand under the base, and the other hand on the arm

Question 2

what are the 5 steps to putting away a microscope

Answer 2

1- turn it off
2- the stage is all the way up
3- place on the scanning objective (the red one and the smallest)
4- eye piece even with the arm
5- clean microscope with an alcohol wipe but not the lenses

Question 3

how do you clean a microscope slide

Answer 3

you can only use lens paper while cleaning it

Question 4

what are the steps to making a temporary slide

Answer 4

1- put the object on glass slide and make sure its small enough to fit under the cover slip
2- drop water on the object
3- with forceps (tweezers) place the cover slip over the object
(if there are large water bubbles drop water right next to the cover slip)

Question 5

how do you stain a slide

Answer 5

1- make a temporary slide and the cover slip MUST be flat
2- drop lodine on one side of the cover slip
3- use the paper towel square on the other side to pull it through
(you can clean this uses lens paper)

Question 6

how do you find an object on the low power objective

Answer 6

1- adjust the diaphragm
2- bring the stage all the way up
3- move the course adjustment slowly till the object comes into focus
4- use the fine adjustment to bring out detail and make it cleaner

Question 7

how do you fins an object on the high power objective

Answer 7

1- find it on low power first
2- without moving the stage turn to high power
3- center the object
4- use the fine adjustment only to bring out the detail
never use the course adjustment

Question 8

identify all parts of the microscope

Answer 8

look at notes (no word bank)

Question 9

explain the characteristics of a compound light microscope (a-e)

Answer 9

A- use light to form on image
B- provides a flat image
C- can be used on living and non-living things
D- the higher the magnification, the worse the resolution
E- highest magnification is 2000x

Question 10

What are the advantages and disadvantages of a compound light microscope

Answer 10

advantages - can be used on living and non-living things
disadvantages - the higher the magnification, the worse the resolution

Question 11

what type of microscope is used in class

Answer 11

compound light microscope

Question 12

define resolution

Answer 12

the clarity or sharpness of the image

Question 13

define image

Answer 13

what you see under the microscope

Question 14

define iris diaphragm

Answer 14

has a central opening with over lapping plates that can be adjusted to increase or decrease the control opening

Question 15

define disc diaphragm

Answer 15

consists of a flat plate, with various sized holes

Question 16

define ocular lens

Answer 16

another name for the eye peice

Question 17

define optical microscope

Answer 17

Any microscope that used light to form an image

Question 18

define examples of optical microscope

Answer 18

microscope, magnify glass, camera, binoculars, telescope, and glasses

Question 19

define stereomicroscope

Answer 19

used to view external structures and used in direction. Provides a 3D image. The magnification is 10x - 60x. The advantages is that it provides the 3D image. The disadvantage is that it only has 10x - 60x

Question 20

define total magnification

Answer 20

found by multiplying the eyepiece times the objective (low - 10 / high - 40)

Question 21

what are the 5 characteristics of an electron microscope

Answer 21

1- it uses electrons to form an image
2- it can only be used on non-living things
3- some will provide a flat image (transmission), and some a 3D image(scanning)
4- the higher the magnification, the better the resolution
5- it can magnify up to 2,000,000x

Question 22

what color is the high power objective

Answer 22

blue

Question 23

what is the magnification of the high power objective

Answer 23

40x

Question 24

what color is the low power objective

Answer 24

yellow

Question 25

what magnification is the low power objective

Answer 25

10x

Question 26

what color is the scanning objective

Answer 26

red

Question 27

what is the magnification of the scanning objective

Answer 27

4x

Question 28

what is the function of the eyepiece

Answer 28

what you look through to see object

Question 29

what is the function of the arm and base

Answer 29

carry the microscope

Question 30

what is the function of the fine adjustment

Answer 30

brings image into focus slowly

Question 31

what is the function of the course adjustment

Answer 31

brings object into focus quickly

Question 32

what is the function of the lamp or mirror

Answer 32

directs light into the microscope

Question 34

what is the function of the iris or disc diaphragm

Answer 34

regulates amount of light

Question 35

what is the function of the iris lever

Answer 35

increase / decrease light coming through

Question 36

what is the function of the stage opening

Answer 36

lets light through

Question 37

what is the function of the stage

Answer 37

holds the slide

Question 38

what is the function of the stage clips

Answer 38

holds the slide in place

Question 39

what is the function of the low power objective

Answer 39

magnifies on image 10x

Question 40

what is the function of the high power objective

Answer 40

magnifies on image 40x

Question 41

what is the function of the revolving nose piece

Answer 41

changed objectives