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