19 terms

Phase Change

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atom
the smallest unit of an element that has the properties of that element.
boil
the change of a liquid to a vapor.
This happens when the vapor pressure equals the atmospheric pressure.
Boiling point
the temperature at which a material changes from a liquid to a gas.
Condensation
the change of state from a gas to a liquid
energy
movement of atoms, molecules, compounds, or matter. Energy comes in many forms including heat, kinetic, potential, mechanical or electrical.
evaporation
the change of state from a liquid to a gas
freeze
the change of state in which a liquid becomes a solid by taking away heat.
freezing point
The temperature at which a substance freezes.
gas
a form of matter that does not have a definite volume or shape
kinetic energy
the energy that an object has because it is moving
liquid
the state of matter that has a definite volume but not a definite shape.
Melt
the change of state in which a solid becomes a liquid by adding heat.
Melting point
The temperature at which a substance melts.
molecular attraction
a pull between two molecules
phase
a noticeably different form or state of the same substance
plasma
a state of matter that starts as a gas and then becomes ionized, meaning that it has free-moving ions and electrons and takes on an electric charge.
Solid
the state of matter in which the volume and shape of a substance are fixed.
States of matter
The physical forms of matter, which include solid, liquid, and gas.
temperature
a measure of how hot or cold something is. The higher the temperature is, the more energy it has.
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