Microscope

A student is viewing a plant stem cross section using a compound light microscope.

What parts of the microscope should the student use to bring the image into focus?

• A & F

• B & E

• C & D

• D & F

Drag the parts of the microscope to the right location on the picture.

f

e

d

c

b

a

Ocular Lens

Arm

Fine adjustment knob

Light Source

Coarse adjustment knob

Objective Lens

A student is viewing a plant stem cross section using a compound light microscope.

In order to focus the microscope in high power, which part would most likely be adjusted?

• A

• E

• B

• D

The diagram below represents a compound light microscope. Several parts have been labeled.

In order to make an image brighter, which labeled part of the microscope would most likely be adjusted?

• A

• B

• C

• D

The diagram below represents a compound light microscope. Several parts have been labeled.

In order to focus a microscope in high power, which part should be used?

• A

• B

• C

• D

The diagram below represents a compound light microscope. Several parts have been labeled.

Which part usually has a magnification of 10x?

• A

• B

• C

• D

A student observed five living cells in the field of view of a microscope as represented below. What is the approximate diameter of one cell?

• 
  10 µm

• 
  50 µm

• 
  250 µm

• 
  500 µm

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The diagram below represents a specimen in the low-power field of view of a compound light microscope.

If the slide is not moved, which view best represents the way the specimen will look when the high-power objective lens is switched into place?

• 
• 
• 
• 

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

The drawings below were made during a laboratory exercise in which a microscope was used to view slides of preserved protozoa. The microscope had a 10x eyepiece and two different objectives.

Which statement about the size of the organisms is correct?

• Organism A is larger than organism B.

• Organism B is larger than organism A.

• Organisms A and B are both the same size.

• The relative size of the organisms cannot be determined from the information given.

Which activity might lead to damage of a microscope and specimen?

• cleaning the ocular and objectives with lens paper

• focusing with low power first before moving the high power into position

• using the coarse adjustment to focus the specimen under high power

• adjusting the diaphragm to obtain more light under high power