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28 terms

chapter1

STUDY
PLAY
submicroscopic
the realm of atoms and molecules, where objects are smaller than can be detected by optical microscopes
chemistry
the study of the composition of matter and the changes that matter undergoes
matter
that which has mass and occupies space
basic research
research dedicated to the discovery of the fundamental workings of nature
applied research
research dedicated to the development of useful products and processes
science
an organized way of gathering and analyzing evidence about the natural world
scientific hypothesis
is a testable assumption, or guess, often used to explain an observed phonomenon
control test
a test performed by scientists to increase the conclusiveness of an experimental test
theory
an explanation using an integrated set of principles that organizes and predicts observations.
mass
the amount of matter in an object.
weight
a measure of the gravitational force exerted on an object
volume
the amount of space an object takes up
energy
the capacity to do work
potential energy
stored energy
kinetic energy
energy due to motion
temperature
a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object
thermometer
measuring instrument for measuring temperature
absolute zero
The coldest temperature, 0 Kelvin, that can be reached. It is the hypothetical temperature at which all molecular motion stops.
heat
the energy transferred between objects that are at different temperatures
solid
matter that has definite volume and definite shape
liquid
a form of matter that flows, has constant volume, and takes the shape of its container
gas
a form of matter that does not have a definite volume or shape
melting
change from a solid to a liquid
freezing
the change of state from a liquid to a solid
evaporation
the change of a substance from a liquid to a gas
boiling
evaporation in which bubbles form beneath the liquid surface
condensation
The change of state from a gas to a liquid
density
the ratio of an object"s mass to its volume