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Chapter 1: Introduction to Chemistry
Intro
18
Chemistry
10th Grade
08/26/2012

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Term
Chemistry
Definition
The study of matter and the changes that it undergoes.
Term
Substance
Definition
Matter that has a definite and uniform composition.
Term
Mass
Definition
Measurement that reflects the amount of matter.
Term
Weight
Definition
Measure not only of the amount of matter but also of the effect of Earth's gravitational pull on that matter.
Term
Model
Definition
Visual,verbal, or mathematical explanation of experimental data.
Term
Scientific Method
Definition
Systematic approach used in scientific study.
Term
Qualitative Data
Definition
Information that describes color, odor, shape, or some other physical characteristic.
Term
Quantitative Data
Definition
Numerical information.
Term
Hypothesis
Definition
Tentative explanation for what has been observed.
Term
Experiment
Definition
Set of controlled observations that test the hypothesis.
Term
Independent Variable
Definition
Variable that is planned to change.
Term
Dependent Variable
Definition
Changes in response to the independent variable.
Term
Control
Definition
Standard for comparison.
Term
Conclusion
Definition
Judgement based on information obtained.
Term
Theory
Definition
Explanation of a natural phenomenon based on many observations and investigations over time.
Term
Scientific Law
Definition
A relationship in nature that is supported by many experiments.
Term
Pure Research
Definition
Used to gain knowledge for the sake of knowledge itself.
Term
Applied Research
Definition
Research undertaken to solve a specific problem.
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