CK-12 Physical Science Concepts - For Middle School

5.37. Hearing and the Ear http://www.ck12.org 5.37 Hearing and the Ear Explain how we sense sound energy and hear sounds. Ident ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.73 The eardrum is like the head of a drum. It is a thin membrane stretched tight ...

5.37. Hearing and the Ear http://www.ck12.org FIGURE 5.74 The outer ear includes the pinna, ear canal, and eardrum. These struc ...

http://www.ck12.org Chapter 5. Energy Loud sounds can damage the hair cells lining the cochlea of the inner ear. Explain how th ...

5.38. Hearing Loss http://www.ck12.org 5.38 Hearing Loss Define deafness. Explain how loud sounds cause hearing loss. Describe ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.75 A:You should be exposed to a 100-dB sound for no longer than 15 minutes. An ex ...

5.38. Hearing Loss http://www.ck12.org FIGURE 5.76 These activities expose people to danger- ously loud sounds that can cause he ...

http://www.ck12.org Chapter 5. Energy Review What is hearing? How is deafness defined? How can loud sounds, like a cheering cro ...

5.39. Musical Instruments http://www.ck12.org 5.39 Musical Instruments Identify common features shared by all musical instrumen ...

http://www.ck12.org Chapter 5. Energy Categories of Musical Instruments There are three basic categories of musical instruments: ...

5.39. Musical Instruments http://www.ck12.org There are three basic categories of musical instruments: percussion instruments s ...

http://www.ck12.org Chapter 5. Energy 5.40 Ultrasound Define ultrasound Describe echolocation. State what sonar is and how it i ...

5.40. Ultrasound http://www.ck12.org FIGURE 5.79 from underwater objects. If you watch the video at the URL below, you can see h ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.80 This technology is used to examine internal organs and unborn babies without r ...

5.40. Ultrasound http://www.ck12.org Summary Ultrasound is sound that has a wave frequency higher than the human ear can detect ...

http://www.ck12.org Chapter 5. Energy 5.41 Electromagnetic Waves Define electromagnetic wave and electromagnetic radiation. Des ...

5.41. Electromagnetic Waves http://www.ck12.org Q:How do microwaves transfer energy inside a microwave oven? A:They transfer ene ...

http://www.ck12.org Chapter 5. Energy FIGURE 5.83 http://www.youtube.com/watch?v=Qju7QnbrOhM http://www.phys.hawaii.edu/~teb/ja ...

5.41. Electromagnetic Waves http://www.ck12.org Therefore, an electromagnetic wave is a transverse wave. However, unlike a mecha ...

http://www.ck12.org Chapter 5. Energy Explore More Watch the electromagnetic wave animation at the following URL, and then answe ...