Sound What does sound travel through Solids Liquids Slides: 41 Download presentation Sound What does sound travel through? Solids, Liquids, and Gases What does sound not travel through? Vacuum What causes sound? Vibrations What does one complete wavelength look like? What does a wave with a low pitch look like? What does a wave with a high pitch look like? What is the top of a wavelength called? Crest What is the bottom of a wavelength called? Trough How do we measure wavelengths? From Crest to Crest Why does sound travel faster along a metal fence than a swimming pool? The molecules are closer together in a solid How is the sound you hear underwater different from the sound you hear in air? The sound underwater travels faster than in the air What is the number of times a sound vibrates in one second called? Frequency What is the highness or lowness of a sound called? Pitch What is the relationship between pitch and frequency? The greater the frequency, the higher the pitch What pitch do shorter strings produce? High (they vibrate faster) What pitch do longer strings produce? Low (they vibrate slower) What do animals use to help detect objects? Echolocation Why can’t people hear some sounds that animals can? The pitch is either too high or too low What device is used to detect objects moving through air or space? Radar What type of device is used to locate objects moving underwater? Sonar