Science: sound

-A quick back-and-forth motion. -A measure of how high or low a sound is. - A measure of how loud or soft a sound is. -Waves that move up and down. -Waves that move along the travel. -The distance between a point on one wave and the identical point on the next wave. - A measure of the number of waves that pass in a second. - A measure of the amount of energy in a wave. - The bouncing of light, sound , or heat off an object. - The taking in of light or sound energy by an object. - the passing of light or sound through a material.