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Changing states requires adding or removing _____.
energy (heat)
The amount of energy determines whether a substance will exist as a _____, ______, or ____.
solid, liquid, gas
The change from solid to gas is called...
sublimation
The change from solid to gas is liquid...
melting
The change from liquid to gas is solid...
freezing
The change from gas to solid is called...
Deposition
The change from gas to liquid is called...
condensation
The change from liquid to gas is called...
evaporation
Heating a substance ______ energy, while cooling ________ it.
adds / removes
Gases have a fixed shape or volume.
False
True
