Question 1

Which part of the microscope should you use to make large adjustments to the focus when using the lowest power objective lens?

Accepted Answer

The coarse focus knob

Question 2

If you are using the 100x objective lens and the ocular lens is 10x, what is the total magnification?

Accepted Answer

$$1000x$$

Question 3

Why should you never use the coarse adjustment knob with the high power (100x) objective lens?

Accepted Answer

It can crack both the slide and the lens

Question 4

What is the correct material to use when cleaning the microscope lenses?

Accepted Answer

Lens paper

Question 5

A student places a slide under the stage clip and applies pressure. What is the most likely outcome?

Accepted Answer

The slide will crack

Question 6

Which part of the microscope is responsible for focusing light onto the specimen?

Accepted Answer

The condenser

Question 7

If you are viewing a specimen with the 10x objective lens and the 10x ocular lens, what is the total magnification?

Accepted Answer

$$100x$$

Question 8

Which of the following is NOT a recommended practice when using a microscope?

Accepted Answer

Cleaning the lens with paper towels

Question 9

A student wants to move the slide horizontally to view a different area. Which part should they use?

Accepted Answer

Stage motion knobs

Question 10

What is the function of the nosepiece on a microscope?

Accepted Answer

It holds and rotates the objective lenses

Question 11

Which sequence correctly describes the path of light in a compound microscope?

Accepted Answer

Lamp → Condenser → Slide → Objective lens → Ocular lens

Question 12

If a student uses the 50x objective lens with the 10x ocular lens, what is the total magnification?

Accepted Answer

$$500x$$

Question 13

Which part of the microscope should you hold when carrying it?

Accepted Answer

The arm

Question 14

A student notices that the image is blurry at high magnification. What is the best first step to improve clarity?

Accepted Answer

Use the fine focus knob

Question 15

Which of the following is a correct safety procedure when using a microscope?

Accepted Answer

Always start focusing with the lowest power objective

Question 16

What is the main function of the stage on a microscope?

Accepted Answer

To support the slide being viewed

Question 17

Which lens combination would provide the lowest total magnification?

Accepted Answer

10x ocular and 4x objective

Question 18

Why is it important to use lens paper instead of paper towels to clean microscope lenses?

Accepted Answer

Lens paper does not scratch the lens

Question 19

A student wants to increase the amount of light passing through the specimen. Which part should they adjust?

Accepted Answer

The condenser

Question 20

Which of the following actions could result in damaging both the slide and the objective lens?

Accepted Answer

Using the coarse focus knob with the high power objective

Microscopy: Structure, Function, and Proper Use of the Compound Light Microscope

Study Guide - Practice Questions