Microscope Test Flashcards 1
To study for the microscope test
What is the most familiar type of microscope?
Standard compound light microscope.
What 2 pieces of the microscope are usually one piece of metal?
The arm and the base.
What 2 pieces of the microscope are used to carry it safely?
The arm and the base.
While you are carrying a microscope, you usually grip the (1) and put your palm at the bottom of the (2).
- Arm
- Base.
What is the specimen?
The object or sample that is being observed.
What is the stage?
The platform that supports the specimen to be observed.
Why does the stage have a hole in its center?
To allow light to pass through.
The specimen must be supported on…
A microscope slide.
You can control how much light goes through the microscope by adjusting the…
Diaphragm.
The diaphragm has a range of…
1-5.
What are stage clips?
2 clips that attach to the slide to help prevent movement when measuring the specimen.
You cannot measure the specimen without a(n)…
Light source.
What is the light source used for?
To help make the specimen visible.
Do microscopes use direct sunlight as their light source?
No.
What do microscopes use as their light source?
Bulbs or mirrors.
Why do microscopes never use direct light as their light source?
They could damage your eyes.
After the light passes through the specimen, it enters the…
Objective lens.
What is the shortest of the 3 objectives called?
The scanning-power objective lens.
The scanning-power objective lens usually has a magnification level of…
4x.
What is the 2nd objective called?
Low power objective.
The low power objective almost always has a magnification level of…
10x.
What is the highest objective called?
High-power objective lens.
The high-power objective lens usually has a magnification level of…
40x.
What is an eyepiece?
A lens at the top of the body tube for your eye to help view the specimen.
What is another word for eyepiece?
Ocular lens.
How do body tubes work?
It allows the light from the objective to pass upward to form the first magnified image; that image is further magnified by the eyepiece or ocular lens.
The eyepiece usually has a magnification level of…
10x.
The total magnification obtained is…
The product of the eyepiece multiplied by that of the objective lens.
You can easily switch objectives by rotating the…
Rotating/Revolving Nosepiece
How many knobs are there on a microscope?
2.
Which knob is bigger on a microscope?
The coarse adjustment knob.
The coarse adjustment knob is used to…
Focus on the specimen.
The coarse adjustment knob should never be used on the…
High-power objective lens.
Why is the coarse adjustment knob never used on the high-power objective lens?
It will break the lens.
The smaller knob on the microscope is called the…
Fine adjustment knob.
The fine adjustment knob is used for…
Minute focusing.
The fine adjustment knob is used…
After the coarse adjustment knob is used.
What 2 structures will you use to measure the specimen?
Coarse adjustment knob and fine adjustment knob.
Our microscope has 3 objectives. What are their powers?
To make things smaller.
