Scientific Invest.
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| Describe a scientist | asks questions, makes observations, experiments, collects/analyzes data, completes research, tries to explain mysteries of life
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| Theory | An explanation that ties together many hypotheses & observations
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| Laws | A summary of many experimental results & observations
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| Steps of the Scientific Method | 1.) State the problem, 2.) Gather information, 3.) Form a hypothesis, 4.) Experiment, 5.) Analyze the data, 6.) Form a conclusion, 7.) Repeat the work
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| Hypothesis | educated guess, possible explanation to a questions (If________, then _________)
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| Independent Variable (IV) | purposely changed factor in the experiment (Scientist Changes This)
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| Dependent Variable (DV) | factor that changes as a result of the purposely changed factor (Experiment Changes This)
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| Constant | any factors that are not allowed to change in the experiment
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| Control | the standard for comparison in the experiment
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| Repeated Trials | carry out the work several times to eliminate errors to get valid results.
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| What possible errors could be made in an experiment? | more than one I.V., measuring errors, too few trials, not enough subjects, small sample size
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| What is the purpose of the International System of Units? | common language that all scientists use to record their data (Metric System)
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| mass | measure of the amount of matter in an object
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| volume | a measurement of the size of a body or region in a 3-dimensional space
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| Basic unit of length | meter
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| Basic unit of mass | kilogram
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| Basic unit of temperature | Kelvin or Celsius
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| Basic unit of volume | liquid: Liter solid: cubic meter
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| compound light microscope | instrument that magnifies small objects so taht they can be seen easily by using 2 or more lenses
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| How do you calculate the total magnification of an object being viewed using a compound light microscope? | Multiply the eyepiece lens times the objective lens
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| Why is it important to have lab safety rules? | Prevent accidents, Avoid Injury, Prevent Damage to equipment
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