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chapter 1
vocabulary
13
Physics
9th Grade
09/01/2006

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Term
Scientific method
Definition
Orderly method for gaining, organizing and applying new knowledge
Term
hypothesis
Definition
Educated guess; a reasonable explanation of an observation or experimental result that is not fully accepted as factual until tested over and over again
Term
Controlled experiment
Definition
An experiment in which only 1 variable is tested at a time. Usually involves an experimental group (that has the changed condition) and a control group (normal group without the change that is used as a basis of comparison)
Term
Variable
Definition
Conditions that can change or be changed
Term
Constants
Definition
Conditions that are kept the same between the testing groups
Term
control
Definition
Test group that is kept under normal conditions. Used as a comparison to see the effect of the changed variable.
Term
independent variable
Definition
Condition that is purposely changed to test its effect - (x-axis)
Term
dependent variable
Definition
The effect or outcome that is the result of changing the independent variable (y-axis)
Term
fact
Definition
A close agreement by competent observers of a series of observations of the same phenomena
Term
inference
Definition
Conclusion based on observations
Term
Law / principle
Definition
A general hypothesis or statement about the relationship of natural quantities that has been tested over and over again and has not been contradicted.OR
Statement about HOW something in nature works
Term
theory
Definition
Synthesis of a large body of information that encompasses well-tested and verified hypotheses about aspects of the natural world.OR
Statement about WHY something in nature works a certain way.
Term
Science
Definition
Method of answering theoretical questions
Discovering facts and relationships about phenomenon in nature and establishing theories that organize these ideas
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