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19 terms

Chapter 1

Introduction to Chemistry
STUDY
PLAY
chemistry
The study of matter and the changes that it undergoes.
matter
Anything that has mass and takes up space.
mass
A measure of the amount of matter.
weight
A measure of an amount of matter and also the effect of Earth's gravitational pull on that matter.
scientific method
A systematic approach used in scientific study that typically includes observation, a hypothesis, experiments, data analysis, and a conclusion.
qualitative data
Information describing color, odor, shape, or some other physical characteristic.
quantitative data
Numerical information describing how much, how little, how big, how tall, how fast, etc.
hypothesis
A tentative, testable statement of prediction about what has been observed.
experiment
A set of controlled observations that test the hypothesis.
independent variable
In an experiment, the variable that the experiment plans to change.
dependent variable
In an experiment, the variable whose value depends on the independent variable.
control
In an experiment, the standard that is used for comparison.
conclusion
A judgment based on the information obtained.
model
A visual, verbal, and/or mathematical explanation of data collected from many experiments.
theory
An explanation supported by many experiments; is still subject to new experimental data, can be modified, and is considered successful it if can be used to make predictions that are true.
scientific law
Describes a relationship in nature that is supported by many experiments.
pure research
A type of scientific investigation that seeks to gain knowledge for the sake of knowledge itself.
applied research
A type of scientific investigation that is undertaken to solve a specific problem.
technology
The practical use of scientific information.