melting - changing from solid to liquid, freezing - changing from liquid to solid, evaporating - particles gaining energy to become a gas, boiling - liquid becomes gas at the boiling point, condensing - changing from gas to liquid, particles in a solid - arranged neatly in layers, particles in a liquid - still touching but in a random order, particles in a gas - particles are spread out, random order, C - it has completely frozen, B - it starts to freeze, A - the liquid is cooling, D - the solid is cooling,

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