methods and procedures used by Biologists to study macro and microorganisms

Provides a magnified image of organisms or cells

found inside the eye piece is where the final magnified image can be viewed, it usually has a magnification of 10x or 15x

found attached to the nosepiece, vary in levels of magnification from x4 up to x1000 or more

Is responsible for the regulation of light for brightness and contrast adjustments

Are the fastest and simplest slides to prepare

Refers to the adhesion of the specimen to the slide and killing microorganisms to stop their movement

is the method of coloring certain cell structures by applying stains or dyes which are made of positive/negative ions

Dyes are composed of

positive ion

Negative Ion

If the dye directly interacts with the specimen

If it reacts with the environment or background it is classified as

All structures the same is used to emphasize to certain structures

distinguishes organisms or structures based on their interaction of different dyes

Makes use of light to fire sectioned specimen up to 200x magnification

makes use of a stream of electrons to study the 3-D surface of a specimen

Makes use of a stream of electrons to study the internal structures of sectioned specimen

Makes use angled light to view 3-D structures of specimen

A process of thinking used by scientist to collect information and provide scientific explanations

Reasoning that is based on specific observations which lead to general conclusions

Reasoning that is based on general principles to explain specific observations

A controlled observation to test a hypothesis, it consists of sample size, variables, controls, and statistical analysis

Experiments where there is complete control over all extraneous variables to predict the effect of the manipulated independent variable

Experiments wherein the independent variable is manipulated to see its effect on the dependent variable

Experiments wherein there is little to no control over extraneous variables

States that life originates from non-living matter. originated from Aristotle and was believed until the 17th century

States that life originates from pre-existing life

stains negatively charged molecules

stains positively charged molecules

stains the background, not the specimen