Biology Lab Microscopes Quiz

The microscope is an instrument designed to make objects visible that are too difficult or too small to see with the unaided ______.

The microscopes commonly used in the biology lab are usually compound binocular or monocular light ______.

The ocular and draw tube rests on the body ______.

Attached to the base of the body tube is the circular revolving ______.

The microscope is focused by turning two ______.

The fine adjustment knob is used for sharp focus after the object has been brought into view with the coarse adjustment ______.

The platform where you put slides for observation is called the ______.

The slide is held in place on the stage with a pair of stage clips or the stage may be equipped with a mechanical device into which the slide is clipped called a ______ stage.

The curved part of the microscope is the ______.

The portion of the microscope in contact with the table is the ______.

Eyepiece or ocular is the removable cylinder on top of the microscope. It contains one set of lenses, the magnifying power of which is indicated on top of the eyepiece (e.g. 10X or 12.5X). The eyepiece is the ______.

Objective lens gives the initial magnification. In general, the lower the magnification, the shorter is the objective lens and the farther is it positioned from the specimen when focused. The microscope may have four of these located on the revolving nosepiece. These are as follows: Scanning lens is a short lens which magnifies the size of an object 4X. It has the broadest field of view of all the lenses, and is used for initial focusing of objects. Low Power Objective (LPO) magnifies by 10X. High Power Objective (HPO) magnifies by 40X. Oil Immersion Objective (OIO) magnifies by 100X. Substage ______ is a lens located under the stage aperture, and its distance from the stage is controlled by a knob.