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States of Matter
solid
liquid
gas
Particle motion of Solids
Tightly packed, vibrate in place
Particle motion of Liquids
Close together, slide past each other
Particle motion of Gases
Far apart, move freely
Solid → Liquid
Melting
Liquid → Gas
Evaporation
Gas → Liquid
Condensation
Liquid → Solid
Freezing
Solid → Gas
Sublimation
Physical Changes
no new substance forms
melting ice
boiling water
dissolving sugar
Chemical Changes
new substance forms
rusting iron
burning wood
baking a cake
Signs of Chemical Change
gas produced'
temperature change
color change
light emitted
solid appears