a pure substance that cannot be broken down
the smallest particle of an atom
a substance that contains two or more elements
a group of two or more atoms joined together by chemical bonds
matter that cannot be separated into other types of matter by physical means. Includes all elements and compounds.
matter that contains a combination of different elements or compounds and can be separated by physical means.
a mixture that is the same throughout. All samples of a homogeneous mixture are the same.
a mixture in which different samples are not necessarily made up of the same proportions of matter.
a temperature scale in which water freezes at 32 degrees and boils at 212 degrees.
a temperature scale in which water freezes at 0 degrees and boils at 100 degrees.
energy due to temperature
a quantity that measures the kinetic energy per molecule due to random motion.
a tool the measures temperature
lowest possible temperature, at which thermal energy is as close to zero as it can be, approximately -273°C.
a temperature scale that starts at absolute zero and has units the same as Celsius degree
a phase of matter that holds its shape and does not flow.
a phase of matter that holds its volume, does not hold its shape, and flows.
a phase of matter that flows, does not hold its volume, and can expand or contract to fill a container.
forces between atoms or molecules in a substance that determine the phase of matter.
the temperature at which a substance changes from solid to liquid (melting) or liquid to solid (freezing).
the temperature at which a substance changes from liquid to gas (boiling) or from gas to liquid (condensation).
a phase of matter in which the matter is heated to such a high temperature that some of the atoms begin to break apart.