microscope

Question 1

Uses 2 compound lenses to magnify objects. The lenses _____ light to make the object beneath them appear closer.

Answer 1

Light microscope
refract

Question 2

What are the three magnification objective lenses

Answer 2

Scanning power
Low power
High power

Question 3

Focusing Specimens
1. Always start with the _____ objectives.
2. Place your specimen in the ______ of your field of view.
3. Use the _____ to focus.
4. Next, use the _______ until clear.
5. Once you’ve focused on scanning, switch to _________
6. Repeat steps 3-4.
7. Switch to _______.
8. Only use the _____________ to focus specimens.

Answer 3

Scanning
center
Coarse knob
fine knob
low power
High power
Fine Adjustment Knob

Question 4

1. Scanning- use _____ knob
2. Low- Use ______ knob
3. High- Use _____ knob only.

Answer 4

Coarse &Fine
Coarse &Fine
Fine

Question 5

Field of view:
The area a person can _____ through a microscope. It is represented by a ______.
As the magnification ________, field of view ________. As you switch from scanning to high, the microscope gets _____.
The lens ______ the image of the object inside the microscope

Answer 5

view
circle
increases
decreases
smaller
inverts

Question 6

What to do?

Image is too dark!

Answer 6

Adjust the diaphragm, make sure ur light is on.

Question 7

What to do?

There’s a spot in my viewing field, even when I move the slide, the spot stays in the same place!

Answer 7

Your lens is dirty. Use lens paper, and only lens paper to carefully clean the objective and ocular lens.

Question 8

What to do?

I can’t see anything under high power!

Answer 8

Remember the steps, if u cant focus under scanning and then low power, u wont be able to focus anything under high power.

Question 9

What are the types of microscopes?

Answer 9

simple microscope
compound light microscope
electron microscope
scanning electron microscope
transmission electron microscope
phase contrast microscope
ultra centrifuge

Question 10

it is called simple because it has only 1 lens

Answer 10

simple microscope

Question 11

it is called compound because it is composed of two lens system

Answer 11

compound light microscope

Question 12

uses electrons to gain data & view objects at externally high magnification

Answer 12

electron microscope

Question 13

is able to show contrast in transparent specimens, no staining is required.

Answer 13

phase contrast microscope

Question 14

spins suspension at high speeds to separate

Answer 14

ultra centrifuge

Question 15

uses a microscope to dissect very small organisms

Answer 15

microdissection

Question 16

Two distinctive types of cells

Answer 16

prokaryotic
eukaryotic

Question 17

smallest eukaryotic cell

Answer 17

RBC

Question 18

a relatively large single celled organism, typically 10-100 micrometer across

Answer 18

amoeba