SOUND

Enduring Understandings: Sound is produced by vibrating objects Vibrating objects produce sound waves that travel through the air (and other substances). The faster an object vibrates the more sound waves it produces per second and the higher the pitch of the sound.

When whales communicate with each other under water, their sound can travel up to 500 miles in the ocean. The speed of sound is around 767 miles per hour(That's about one mile in 5 seconds) Sound is used by many animals to detect danger, warning them of possible attacks before they happen. There is no sound in space because there is no object for sound to travel through.  In Africa, a tribe of people called Maabans live in such quiet that they can hear a whisper from across a baseball field (even when they are very old.) Dogs can hear sound at a higher frequency than humans, allowing them to hear noises that we can’t. The scientific study of sound waves is known as acoustics. When traveling through water, sound moves around four times faster than when it travels through air.