Book+3+2.5

=V. Using Sound= =A. Some animals hear ultrasound and produce waves= =B. Echolocation- the use of reflected sound waves to determine distances or to locate objects= =1. Bats, dolphins use it to navigate and find food= =2. Bats- use ultrasound waves with frequencies up to 100,00 Hz to move and hunt= =3. Dolphins, porpoises, whales= =I. Hunt in darkness= =ii. frequencies up to 150,000 Hz= =iii. waves travel thru water and bounce off fish= =C. Ultrasound Technologies= =1. Sonar and Ultrasound imaging are used to observe things that cant be seen directly= =2. Sonar- system that uses reflected sound waves to detect and locate objects underwater.= =I. sound navigation and ranging= =ii. determine depth of water= =iii. map ocean floor= =iv. locate sunken ships, schools of fish or other objects on ocean floor= =v. Sends bursts of ultrasound waves that travel thru water= =3. Ultrasound imaging- devices send ultrasound waves into the body to detect the reflected waves= =I. sonargram- devices uses reflected ultrasound waves to create picture= =Quiz= =1. As bats fly, they send out high frequency sound waves. They listen to how long it takes to return. By picking up the reflections or echoes, they can tell if there is an object nearby.= =2. EG- determine depth of water; locate sunken ships= =3. Sonar produces high frequency sound waves. Waves travel thru water, either horizontally or vertically. When hits object they reflect, reflected waves are detected by sonar device.= =4. EG- ultrasound used in medicine to examine developing babies= =5. use of reflected sound waves by bats and other animals to navigate and find food= =6. system of detecting reflected sound waves= =7. image formed by an ultrasound machine= =Study Guide= =8. except resonance= =19. true= =25. mapping ocean floor, determine depth of water, locate object in ocean= = =