alter - when you change something, form - a _____ is a distinct state of matter, freeze - to become solid or icy at a very low temperature, liquid - a substance that can be poured, melt - when something changes from a solid to a liquid, occur - when something happens, solid - when something is firm, one state of matter, state - the way a person or thing is at a certain time, substance - the material something is made of, temperature - how hot or cold something is, thermometer - a tool used to measure temperature, trap - to catch something and not let it go,

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