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30 Cards in this Set

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  • Back
Hypothesis
Possible answer to a proposed question. "educated guess"
Null Hypothesis
States that the treatment has no effect on the outcome of the experiment
Independent Variable
can be manipulated or changed by the researcher
Dependent Variable
the observed (measured or counted) outcome of the test; what happens to the dependent variable "depends" on what is manipulated in the independent variable
Control Variable
All other variables that must remain constant during the test
Control Group
the group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the experiment
Experimental Group
the group that is given the one differing variable, the independent variable
Scientific Meathod
1. Making Observations
2. Asking Questions
3. Proposing Answers(Hypothesis or educated guess)
4. Testing the Hypothesis
5. Accepting or rejecting the hypothesis
6. Repeating the test- other scientists should be able to produce the same results
meter
liter
gram
standard unit of length
standard unit of volume
standard unit of mass
Centi
milli
micro
nano
One hundredth
one thousandth
one millionth
one billionth
Ocular
lens nearest the eye
body tube
keeps ocular and objective lenses at proper distance from each other
nosepiece
permits interchange of low, medium, and high power objectives
pointer
found in ocular, can be moved by turning the black eyepiece
arm
supports body tube and adjustment knobs
objectives
contains lenses of various magnification
coarse adjustment
changes the distance between the slide and the objective to focus an image
fine adjustment
permits exact focusing
base
bears the weight of the microscope
stage
supports slides
stage clips
holds slide steady
iris diaphragm
regulates amount of light going through specimen
illuminator
provides light source
magnigication
tells how much larger the object appears under the scope than it actually is.
magnifying power of ocular
10X
Field of view
the circular field you see when you look through the ocular
Depth of focus
the thickness of an object that is all in sharp focus at the same time
working distance
space between the slide and the objective
does the working distance increase or decrease as the magnification increases?
decrease
Does the light intensity increase or decrease as the magnification increases?
decrease