sound level meter - a machine to measure how loud a sound is, vibrate - to shake very quickly back and forth, string instrument - a musical instrument that you play by vibrating strings, travel - to move from one place to another, muffle - to make sound less and less clear, steam - water in the gas phase, liquid - matter that is wet and can change shape, for e.g. water, freezing - when you cool a liquid until is changes to a solid, melting - when you heat a solid and it changes to liquid, matter - what everything is made of; - solid , liquid , gas, boiling point - the temperature at which a liquid boils, decibel - a unit for measuring the volume of sound,

Match to its definition - Sound and Matter

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