chap 2

Question 1

an optical instrument used to observe tiny objects

Answer 1

microscope

Question 2

microscope containing only one magnifying lens

Answer 2

simple lens

Question 3

could be considered a simple microscope

Answer 3

magnifying glass

Question 4

magnifying power of simple microscope

Answer 4

x300

Question 5

magnifying power of compound microscope

Answer 5

x1000

Question 6

from a built-in light bulb

Answer 6

compound light microscope

Question 7

at the top of the microscope

Answer 7

ocular lens (eyepiece)

Question 8

magnifying lens of ocular lens

Answer 8

x10

Question 9

above the stage that holds the objective lens

Answer 9

revolving nosepiece

Question 10

held in place above the stage that holds the objective lenses by the revolving nosepiece

Answer 10

objective lenses

Question 11

directly beneath the nosepiece and objective lenses

Answer 11

stage

Question 12

flat surface on which the specimen is placed

Answer 12

stage

Question 13

on the condenser that is used to adjust the amount of light passing through the condenser

Answer 13

iris diaphragm control arm

Question 14

beneath the stage that contains a lens system that focuses light onto the specimen

Answer 14

condenser

Question 15

beneath the condenser that controls the amount of light entering the condenser

Answer 15

collector lens with field

Question 16

front side of the base that controls the amount of light emitted from the light source

Answer 16

rheostat control knob

Question 17

attached to the field diaphragm that is used to adjust the amount of light passing through the collector lens

Answer 17

field diaphragm lever

Question 18

contains the light sources

Answer 18

base

Question 19

beneath and behind the condenser that is used to adjust the height of the condenser

Answer 19

condenser control knob

Question 20

on the arm of the microscope near thee base that is used to focus the objective lenses

Answer 20

fine and coarse adjustment knob

Question 21

supports the binocular body and the revolving nosepiece

Answer 21

arm

Question 22

held with one hand when carrying the microscope, with the other hand beneath the base to support the weight of the microscope

Answer 22

arm

Question 23

holds the ocular lenses in their proper locations

Answer 23

binocular body

Question 24

resolving power of the compound light microscope is

Answer 24

approx 0.2 micrometer

Question 25

uses an electron beam as a source of illumination and magnets to focus the beam

Answer 25

electron microscope

Question 26

two types of electron microscopes

Answer 26

transmission electron microscopes

scanning electron microscopes

Question 27

has a very tall column, at the top of which an electron gun fires a beam of electrons downward

Answer 27

transmission electron microscope

Question 28

resolving power of a transmission electron microscope is

Answer 28

approx 0.2 nm

Question 29

has a shorter column and the specimen is placed at the bottom of the column

Answer 29

scanning electron microscope

Question 30

scanning electron microscope have a resolving power of about

Answer 30

20 nm which is 100 times less than the resolving power of transmission electron microscope

Question 31

photographs taken using compound light microscopes are called

Answer 31

photomicrographs

Question 32

photographs taken using the transmission and scanning electron microscopes are called

Answer 32

transmission electron micrographs

scanning electron micrographs

Question 33

enables to observe living cells at extremely high magnification

Answer 33

atomic force microscopes

Question 34

it is possible to observe single live cells in aqueous solutions

Answer 34

atomic force microscopes