1.4 Microscope

Question 1

what is a microscope?

Answer 1

a device that produces magnified images and structures that are too small to see with the unaided eye

Question 2

light microscopes produce…

Answer 2

magnified images by focusing visible light rays

- produce clear images of objects at a magnification of 1000x

Question 3

compound light microscopes…

Answer 3

allow light to pass through the specimen and use 2 lenses to form and image

Question 4

electron microscopes…

Answer 4

use beams of electrons to produce magnified images

• used to see even smaller objects
• magnifies 1000x more than light microscopes (1,000,000)
• ONLY used to see non-living preserved cells/tissues

Question 5

biologists use two main types of electron microscopes:

Answer 5

TEM transmission electron microscope 2D

SEM scanning electron microscope 3D

Question 6

how do scientists prep non-living preserved cells/ tissues

Answer 6

by dehydrating and preserving

Question 7

TEM microscopes

Answer 7

cell structures and large protein molecules

- MUST BE cut into ultra thin slices

Question 8

SEM microscopes

Answer 8

gives 3D images of cells

- DO NOT have to be cut in thin slices