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666-CR-MSS05-NC6 8/17/04 3:37 PM Page 575 Objectives Review 6.03 6. Which is related to the amplitude of a sound wave? 9. The illustration below shows sound waves emitted by a ship on a lake. A the wavelength of the sound wave B the loudness of the sound wave C the pitch of the sound wave D the speed of the sound wave 6.03 7. Which part of the ear transmits nerve impulses to the brain? A anvil B cochlea How is the distance from the ship to the bottom of the lake determined? C eardrum A by measuring the time needed for a sound wave to reach bottom and return D oval window B by measuring the time needed for a sound wave to reach the bottom 6.03 C by measuring the frequency of an echo 8. The table below shows the speed of sound in different materials. Speed of Sound in Different Materials Material Speed of Sound (m/s) Air 343 Water 1,483 Steel 5,940 D by measuring the loudness of an echo 6.03 10. Which best describes the motion of particles in a material as a compressional wave travels in the material? A The particles move at right angles to the direction the wave is traveling. You are 150 m from a batter at a baseball game. How long after the batter hits the ball do you hear the sound? B The particles move back and forth along A 0.01 s C The particles move in the same direc- the direction the wave is traveling. tion as the wave is traveling. B 0.44 s D The particles move in the opposite C 2.3 s direction as the wave is traveling. D 9.9 s nc6.msscience.com/objectives_review OBJECTIVES REVIEW 575
