Solid, Something that keeps its shape and is hard., Liquid, Something that can flow and takes the shape of its container., Gas, Something you cannot see easily and spreads everywhere., Melting, when a solid turns to liquid, like when solid ice melts to liquid water, Freezing, when a liquid turns to solid, like when liquid water freezes to solid ice, Evaporating, When a liquid turns into gas., Condensing, When a gas turns into liquid., Reversible, A change that can go back to how it was before., Irreversible, A change that cannot go back to how it was before., State, The form of matter, Temperature, How hot or cold something is

Reversible or Irreversible

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