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Chapter 5 Lesson 3

Changes of State

QuestionAnswer
condensation happens when a substance changes from a gas to a liquid
sublimation happens when a substance changes directly from a solid to a gas
freezing point the temperature at which a substance changes from a liquid to a solid
boiling point the temperature at which a substance changes from liquid to a gas
melting point the temperature at which a substance changes from a solid to a liquid
evaporation happens when a substance changes from a liquid to a gas
thermal expansion the increase in an object's volume due to a change in heat
thermal contraction the decrease in an object's volume due to a change in heat
3 states of matter solid, liquid, gas
solid molecules are tightly packed allowing very little room for movement
liquid molecules move more freely and take on the shape of its container and has a definate volume
gas molecules are far apart and has no definate volume or shape
heat the removal or addition of this causes matter to change states
dew or moisture on outside of a soda can example of condensation
dry ice example of sublimation
Created by: rhodesrhonda on 2010-11-15



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