Science 3rd Quarterly Examination

Illuminating parts

Are the parts that provide light

Mirror

Reflects the light from the source to the specimen

Condenser

Concentrates light coming from the light source

Diaphragm

Regulates the amount of light striking the specimen

Eyepiece

Focuses light on the eye; the part where the observer peeps through

Objective

Gathers light

Magnifying parts

Are the parts that enlarge the object or specimen

Ocular lenses

Enlarges the object to five times or ten times

Objective lenses

They magnify the image

Scanner

Locates the position and enlarges the specimen (4x, 5x)

Low power objective

Locates and enlarges the specimen 10 times

High power objective

Enlarges the specimen 40, 43, or 45 times

Oil immersion objective

Enlarges the object 100 times

Mechanical parts

Are the parts of the microscope that support, adjust, connect, and move other parts

Base

Supports the entire weight of the microscope

Pillar

Connects the base and the body of the microscope

Arm

Supports the body tube

Body tube

Connects the lenses of the objectives and the ocular

Stage

Supports the slide

Stage clips

Hold the slide firmly in place

Adjustment screws

Move the objectives to bring the specimen into focus

Coarse adjustment screw

Fine adjustment screw

Give the 2 adjustment screws

Coarse adjustment screw

Is the large knob that moves the body tube faster to focus the specimen

Fine adjustment screw

Is the smaller knob that is used so as to get a sharp focus of the specimen being viewed

Revolving nosepiece

Is the rotating disc that holds the different objectives and allows for the shifting from one objective to the next

Dust shield

Protects the lenses in the objectives from dust

Specimens

Being used for microscopic investigations are usually mounted on a glass slide and covered with a thin glass coverslip

Magnification

Pertains to the number of times the specimen is being enlarged under a compound microscope

Simple microscope

Compound microscope

Two types of microscopes

Simple microscope

Are composed of one lens and provide relatively low magnifying powers

Compound microscope

Are composed of two or more lenses that provide powerful magnification

Robert hooke

He discovered tiny compartments in a thin slice of cork

Zacharias janssen and hans

They discovered a compound microscope that uses two lenses

Anton van leeuwenhoek

Father of microscopy

Cells

What did hooke call the tiny compartments in a thin slice of Cork?