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16 terms

Chapter 1: Intro to Chemistry

current words
STUDY
PLAY
chemistry
the study of the composition of matter and the changes that matter undergoes
matter
that which has mass and occupies space
scientific method
a method of investigation involving observation and theory to test scientific hypotheses
observation(qualitative)
an observation made by using the senses
observation(quantitative)
measurements with numbers and units
prediction
what you thought would happen before preforming an experiment
hypothesis
why you thought your prediction would happen
experiment
the act of conducting a controlled test or investigation
law
simply describes what happens(does not explain why); often a mathematical equation
theory
developed after many experiments to explain how or why behaviors happen; often revised over time
independent variable
manipulated by the scientist; you decide what value you want
dependent variable
measured or observed variable
constant
all variables not being tested in the experiment
experimental control
standard for comparison; needed to draw a valid conclusion
multiple trials
preforming exactly the same experiment more than once keeping all conditions the same
International System of Units (SI)
Established in 1960, uses base units, derived units and prefixes.