20 terms

science notecards

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control (group)
a group that does not undergo change and is used compare against the experimented groups
sentence: The control group was the only group that we didn't put the special soil on.
independent variable
a variable whose variation does not depend on that of another.
sentence: In mathematical modeling, statistical modeling and experimental sciences, the values of dependent variables depend on the values of independent variables.
dependent variable
a variable that changes in response to the independent variable
sentence: A dependent variable is what you measure in the experiment and what is affected during the experiment.
hypothesis
an educated guess made at the beginning of the scientific process
sentence: My hypothesis was that the water would turn black if we put black food coloring in it.
data
facts and statistics collected together for reference or analysis
sentence: The data we collected showed a pattern.
law
a statement backed up by evidence and approved by others
sentence: One scientific law is Newton's Law.
analysis
detailed examination of the elements or structure of something
sentence: Qualitative analysis determines what substances are present in a compound.
conclusion
the ending decision that explains the problem and solves it
sentence: I came to a conclusion that my mass was the same no matter where I went.
observation
the action or process of observing something or someone carefully or in order to gain information
sentence: I made an observation that the algae were green.
theory
an idea, not approved by all, but backed up by evidence
sentence: My little brother's theory was that Batman is real.
controlled experiment
a test where the person conducting the test only changes one variable at a time in order
sentence: In a controlled experiment, an independent variable is the only factor that is allowed to be adjusted, with the dependent variable as the factor that the independent variable will affect.
controlled variables
quantities that a scientist wants to remain constant
sentence: Controlled variables are variables that an experimenter keeps constant to prevent confounding with the independent variable.
experimental group
the group in an experiment that receives the variable being tested
sentence: We tested the Miracle Grow on the experimental group of plants.
scientific inquiry/process/method
the series of steps one must complete to find an explanation of unknown variables in an experiment
sentence: I used the Scientific Method to figure out my scientific question.
qualitative observation
data that can be observed with our senses: sight, smell, touch, taste, and hearing
Sentence: I made a qualitative observation that the jello was jiggly.
quantitative observation
made with numbers and are measurable
sentence: I made a ? that the mass of the jello was 1.13 g/cm3
precision
the quality, condition, or fact of being exact and accurate
sentence: The deal was planned and executed with military ??.
accuracy
the quality or state of being correct or precise
sentence: We have confidence in the ? of the statistics.
volume
the space something takes up
sentence: The sewer could not cope with the ? of rainwater.
density
a measure of how much stuff an object has in a unit volume
sentence: In the surgery there was a reduction in bone density.
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