Chapter 8 Science

Question 1

What did Hans & Zacharias Janssen discover?

Answer 1

invented the first compound microscope that
magnified objects 20-30 times
(16th century)

Question 2

What did Galileo Galilei discover?

Answer 2

invented one of the first telescopes to observe the stars and space
(17th century)

Question 3

What did Robert Hooke discover?

Answer 3

observed a cork under a microscope and discovered “little compartments” and called them “cells.”
(1665)

Question 4

What did Anton Van Leeuwenhoek discover?

Answer 4

was the first to study living things and also studied
blood, pond water, teeth scrapings, and bacteria using his own made microscope
(1676)

Question 5

What did Max Knoll & Ernst Ruska and discover?

Answer 5

invented the first type of microscope to use electrons to magnify specimens (TEMs & SEMs) (1931)

Question 6

What did Heinrich Rohrer & Gerd Binning discover?

Answer 6

invented the first scanning tunneling microscope which produced images of the atomic structures of the surface of
materials. (1981)

Question 7

simple microscope

Answer 7

microscope with one lens (ex: hand lens)

Question 8

compound microscope

Answer 8

microscope with 2 lens

Question 9

compound light microscope

Answer 9

microscope with two lenses and uses a light source
to help make the stage brighter

Question 10

transmission electron microscopes (TEM)

Answer 10

uses electrons that pass through the specimen to help magnify and study the inside of the specimen

Question 11

scanning electron microscopes (SEM)

Answer 11

uses electrons that bounce off the specimen to help study the outside of the specimen

Question 12

scanning tunneling microscopes (STM)

Answer 12

uses an electrically charged metal tip and electrons to scan the surface of the specimen to study the atomic structure of the
surface of the specimen

Question 13

eyepiece

Answer 13

where you place your eye (10x)

Question 14

body tube

Answer 14

tube that supports the eyepiece

Question 15

nose piece

Answer 15

holds the objective lens

Question 16

scanning objective lens

Answer 16

smallest mag (4x)

Question 17

low-powered lens

Answer 17

a small lens with low mag (10x)

Question 18

high-powered lens

Answer 18

a large lens with high mag (40x)

Question 19

stage clips

Answer 19

metal clips that hold the slide securely onto the stage

Question 20

diaphragm

Answer 20

an adjustable opening, under the stage, allowing different amount of light onto the stage

Question 21

light source (mirror)

Answer 21

directs light upward onto the slide

Question 22

arm

Answer 22

attaches the eyepiece and body tube to the base

Question 23

stage

Answer 23

the platform on which the slide is placed

Question 24

coarse focus adjustment knobs

Answer 24

a knob that makes large adjustment to the focus

Question 25

fine adjustment knob

Answer 25

brings item to sharp focus

Question 26

base

Answer 26

this supports the microscope