Sound is a form of ____.When the string of a guitar is plucked, it moves back and forth rapidly, or ____. When something vibrates, it produces sound. Sound travels through air particles in the form of ____ ____ to reach our ears. A thin piece of ____ inside our ear acts as a drum. This is called the ____. When the sound waves strike your eardrum, these ____ are recognized by your brain as sound. We know that sound can travel through ____, liquids, and gases. Since sound is passed from one particle to another in waves, the ____ together the particles, the faster the sound travels. So, sound travels fastest in solids and slowest in ____. Since there is no ____ in space, sound does not travel in space

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