Microscopes and Scientists

Question 1

cell theory

Answer 1

1. all organisms are composed of one or more cells
2. the cell is the basic unit of structure and organization in organisms
3. all cells come from preexisting cells

Question 2

In the 1600s, who came up with the microscope (his claim is disputed)

Answer 2

Zacharias Jansen

Question 3

What was Anton van Leeuwenhoek’s contribution to microscope?

Answer 3

He built his own

Question 4

Who discovered the existence of bacteria and how, and what did he call them?

Answer 4

Anton van Leeuwenhoek discovered bacteria by studying his own teeth, he called them ‘animalcules’

Question 5

Why did Hooke use the term ‘the cell’ to describe what he saw in the microscope

Answer 5

the little chambers he saw reminded him of cells that monks lived in

Question 6

What did Matthias Schleidan realize about plants?

Answer 6

every single plant was made of cells

Question 7

What Theodore Schwann realize about animals?

Answer 7

all animals were made of cells

Question 8

What was Ruldoph Virchow’s contribution to the cell theory?

Answer 8

said that cells did come from preexisting cells

Question 9

Robert Brown

Answer 9

discovered and named the nucleus

Question 10

Compound Light Microscope

Answer 10

• uses visible light and lenses

- can view living and non-living specimens

Question 11

Electron Microscope

Answer 11

• uses beams of electrons instead of light
• see things 1000x smaller than seen with visible light
• cannot view living specimens

Question 12

Transmission Electron Microscope

Answer 12

best used to see inside specimen

Question 13

Scanning electron microscope

Answer 13

best used to see surfaces

Question 14

Body tube

Answer 14

Maintains the proper distance between the nosepiece and the eyepiece

Question 15

Revolving nosepiece

Answer 15

contains the objective lense

Question 16

low power obj lens

Answer 16

magnifies objects 4x

Question 17

med power obj lens

Answer 17

magnifies objects 10x

Question 18

high power obj lens

Answer 18

magnifies objects 40x

Question 19

stageclips

Answer 19

holds the slide in place

Question 20

diaphragm

Answer 20

controls the amount of light passing through the slide

Question 21

light source

Answer 21

provides light for viewing the specimen

Question 22

eyepiece

Answer 22

allows user to see the specimen, magnifies 10x

Question 23

arm

Answer 23

supports the nosepiece

Question 24

stage

Answer 24

supports the slide

Question 25

coarse adj knob

Answer 25

moves the stage/nosepiece up or down

Question 26

fine adj knob

Answer 26

focuses the view of the specimen

Question 27

base

Answer 27

supports the microscope