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Yoga

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Chapter 15 By Standard

Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.

____1.Sound needs a medium through which to travel. _______________

____2.Sound waves travel slower in water than in air. _______________

____3.The distance from one crest of a wave to the crest of the next wave is the wavelength. _______________

____4.When a car passes you, the sound changes as it gets closer and then farther away. This is called the acoustical effect. _______________

____5.Things sound louder outside than inside because of absorption. _______________

____6.A music hall is designed with good echoes so that everyone can hear the music well. _______________

____7.Sounds are produced when matter cools. _______________

____8.The greater the energy of a sound wave, the higher the pitch. _______________

____9.The hertz is the unit to measure the intensity of a sound. _______________

____10.As your vocal cords become thinner, the pitch becomes higher. _______________

____11.Bats use reverberation to locate insects. _______________

____12.Brass and wind instruments make sound by vibrating a membrane. _______________

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____13.Sound is a form of _____. a. | potential energy | c. | mechanical energy | b. | kinetic energy | d. | thermal energy |

____14.Which of the following media can sound NOT travel through? a. | air | c. | metal | b. | empty space | d. | water |

____15.When a wave travels through a medium _____. a. | particles are transferred from one place to another | b. | energy is transferred in a periodic manner | c. | energy is transferred at a

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