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Scientific Method

Study Vocab of the Scientific Method Unit

Observation Describing something exactly how you sense it (see, smell, taste, hear, feel).
Inference A quick conclusion that attempts to explain an observation.
Prediction To forecast or guess the outcome.
Analysis To separate data into smaller pieces of study. To make sense of data.
Conclusion To accept or reject a hypothesis. Last step in scientific method.
Data Recorded observations in experiment
Hypothesis A tentative explanation or educated guess of an event based on research.
Controlled Experiment An experiment where all variables are controlled except for the one being tested for.
Variable Anything that can change in an experiment.
Constant/Control Variable All the variables that remain the same in an experiment.
Control Group The experimental group that has no changes. The group you compare to.
Independent Variable The variable that you change in an experiment. "I" change or "I" choose.
Dependent Variable The variable that you measure in an experiment. What you are looking for.
What is the first step to the scientific method? Observation
What is the difference between an observation and an inference? An observation simply states what is happening, where an inference offers an explanation as to why it is happening.
Data involving numbers Quantitative data
Data involving descriptions Qualitative data
What is the difference between hypotheses, theories, and laws? Hypotheses are least tested, theories give explanations as to why after many experiments, and laws explain what happens and no longer need to be tested.
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
Why is it important to have lab safety rules? Prevent accidents, Avoid Injury, Prevent Damage to equipment, Do experiment correctly
What type of microscope do we use in lab? Light Microscope
What type of microscope is used to get a top view of thick specimen? Dissecting scope
What type of electron microscope gives a detailed look inside very small specimens? Transmission Electron Microscope
What type of electron microscope gives a 3-D image of a very small specimen? Scanning Electron Microscope
Why do you drop a cover slip on a slide the way we do? To prevent air bubbles
What does the diaphragm of a microscope do? Controls the amount of light to pass through slide
When do you use the coarse adjustment knob? Only on low power
Why do you use only the fine focus adjustment on high power? If you use the coarse adjustment, you could break the slide.
How much does the eyepiece magnify? 10 time (10x)
How do you figure out the total magnification of a microscope? Eye piece (10) times objective lens = total magnification Example 10 (eyepiece) x 40 (low power) = 400 (total mag)
Where does the independent variable always go on a graph? X-axis
Where does the dependent variable always go on a graph? Y-axis
Where can you get the most current and reliable research for science topics? Scientific Journals
We measure volume using: Graduated cylinders using milliliters (mL)
What are metric measurements for length? millimeters (mm), centimeters (cm), meters (m)
Where does broken glass go after a laboratory accident? the ceramic container in the back of lab
Created by: Rylands