Chapter 8: The Sound of Nature

Question 1

a longitudinal wave that is caused by vibrations and that travels through a material medium

Answer 1

sound wave

Question 2

a physical environment in which phenomena occurs

Answer 2

medium

Question 3

a measure of how high or low a sound is perceived to be, depending on the frequency of the sound wave

Answer 3

pitch

Question 4

an observed change in the frequency of a wave when the source or observer is moving

Answer 4

Doppler effect

Question 5

the extent to which a sound can be heard

Answer 5

loudness

Question 6

the most common unit used to measure loudness (

Answer 6

decibel

Question 7

a reflected sound wave

Answer 7

echo

Question 8

the process of using reflected sound waves to find objects; used by animals such as bats

Answer 8

echolocation

Question 9

the combination of two or more waves that result in a single wave

Answer 9

interference

Question 10

the explosion sound heard when a shock wave from an object traveling faster than the speed of sound reaches a person’s ears.

Answer 10

sonic boom

Question 11

a pattern of vibration that simulates a wave that is standing still

Answer 11

standing wave

Question 12

k

Answer 12

resonance