Sound is created by a __________ object. ____ This is called a sound __________. ____ The sound source moves the ____ _______ that surround them. ____ These particles create a ______ wave. ____ This wave travels in all ________ , until it finds something to stop it, like________ ____ Sound cannot travel through __________ because there are no particles to carry the vibrations. ____ When sound reflects off a surface and comes back, we hear __________. ____ Sound travel through ..................... such as solid, liquid, or gas ( like air) .____

Science retrieval - Sound - Year 4

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