CHAPTER NEW CHAPTER Sound the BIG idea The

CHAPTER NEW CHAPTER Sound the BIG idea The ear responds to sound waves. 12. 1 Sound is one type of wave. 12. 2 People produce and detect sound waves. 12. 3 The ear responds to sounds. CHAPTER OUTLINE CHAPTER RESOURCES

12. 1 KEY CONCEPT CHAPTER HOME Sound is one type of wave. CALIFORNIA Content Standards 7. 5. g Students know how to relate the structures of the eye and ear to their functions. VOCABULARY wave sound medium frequency hertz wavelength CHAPTER RESOURCES SECTION OUTLINE

12. 1 KEY CONCEPT CHAPTER HOME Sound is one type of wave. Sound is a longitudinal wave that travels through a material medium, such as air. VOCABULARY wave sound medium frequency hertz wavelength SIMULATION Explore how sound travels through air. CHAPTER RESOURCES SECTION OUTLINE

12. 2 KEY CONCEPT CHAPTER HOME People produce and detect sound waves. CALIFORNIA Content Standards 7. 5. g Students know how to relate the structures of the eye and ear to their functions. VOCABULARY pitch outer eardrum middle ear inner ear CHAPTER RESOURCES SECTION OUTLINE

12. 2 KEY CONCEPT CHAPTER HOME People produce and detect sound waves. A sound wave with a lower frequency and longer wavelength is perceived to have a lower pitch. VOCABULARY pitch outer eardrum middle ear inner ear A sound wave with a higher frequency and shorter wavelength is perceived to have a higher pitch. CHAPTER RESOURCES SECTION OUTLINE

12. 2 KEY CONCEPT CHAPTER HOME People produce and detect sound waves. A sound wave with a lower frequency and longer wavelength is perceived to have a lower pitch. VOCABULARY pitch outer eardrum middle ear inner ear A sound wave with a higher frequency and shorter wavelength is perceived to have a higher pitch. VISUALIZATION CLASSZONE. COM See the process of hearing in action. CHAPTER RESOURCES SECTION OUTLINE

12. 3 KEY CONCEPT CHAPTER HOME The ear responds to sounds. CALIFORNIA Content Standards VOCABULARY decibel 7. 5. g Students know how to relate the structures of the eye and ear to their functions. CHAPTER RESOURCES SECTION OUTLINE

12. 3 KEY CONCEPT CHAPTER HOME The ear responds to sounds. The fluid-filled cochlea transfers sound waves in the inner ear into electrical signals that are then transmitted by nerves to the brain. VOCABULARY decibel CHAPTER RESOURCES When air is more compressed, the pressure and energy are greater and the sound you hear is loud. SECTION OUTLINE

12. 1 KEY CONCEPT CHAPTER HOME Sound is one type of wave. I. Sound is one type of wave. VOCABULARY wave A. Sound is a pressure wave. sound B. Moving air carries sound waves. medium 1. Longitudinal Waves frequency 2. Transverse Waves hertz C. Sound needs a medium to travel. wavelength D. Sound and other waves have measurable properties. E. Frequency, wavelength, and speed are related. CHAPTER RESOURCES KEY CONCEPT SUMMARY

12. 2 KEY CONCEPT CHAPTER HOME People produce and detect sound waves. II. People produce and detect sound waves. A. Faster vibrations produce higher frequencies. VOCABULARY pitch outer ear B. Humans can hear a wide range of frequencies. eardrum C. The human ear has three main parts. middle ear inner ear CHAPTER RESOURCES KEY CONCEPT SUMMARY

12. 3 KEY CONCEPT CHAPTER HOME The ear responds to sounds. III. The ear responds to sounds. VOCABULARY decibel A. Air pressure moves the eardrum. 1. Detecting Sound 2. Levels of Sound B. Loudness affects the ear. 1. Response of the Ear 2. Controlling Sound CHAPTER RESOURCES KEY CONCEPT SUMMARY

CHAPTER HOME Chapter Resources Image Gallery Review Game Click here to review chapter images and animations Animations Play a fun interactive review game Link to all the Mc. Dougal Littell Science animations Click on the items below to access resources on Content Review key concepts and vocabulary Resource Center Get more information on select science topics Standardized Test Practice state standardized tests BACK TO CHAPTER CLASSZONE. COM Audio Readings Hear chapter audio readings Math Tutorial Review math concepts