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Lesson 3.6

Changes In State

TermDefinition
melting a change in state from a solid to a liquid; the opposite of freezing
melting point temperature at which a solid becomes a liquid
freezing a change in state from a liquid to a solid; the opposite of melting
vaporization change in state from a liquid to a gas; the opposite of condensing
evaporation vaporization that takes place at the surface of a liquid
boiling vaporization that occurs both at the surface and below the surface
boiling point the temperature at which a liquid boils
condensation a change in state from gas to a liquid; the opposite of vaporization
sublimation change that occurs when the particles on the surface of a solid gain enough energy that they form a gas
What happens to the particles of a solid as it melts? At a solid’s melting point, its particles vibrate so fast that they break free from their fixed positions.
What happens to the particles of a solid as it sublimes? During sublimation, particles of a solid do not pass through the liquid state as they form a gas.
What happens to the particles of a liquid as it freezes? At a liquid’s freezing point, its particles are moving so slowly that they begin to take on fixed positions.
What happens to the particles of a liquid as it vaporizes? Vaporization occurs when the particles in a liquid gain enough energy to move independently.
What happens to the particles in a gas when it condenses? Condensation occurs when particles in a gas lose enough thermal energy to form a liquid.
Particles in which state of matter have the greatest amount of thermal energy? gas
Which two changes in state happen at the surface of a substance? sublimation and evaporation
Created by: mchilds
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