Page 80 - Science Course 3 (Book 2)

Mo10-L4: Key Concept Organizer

Direction: On the line before each def nition, write the letter of the term that matches it correctly.
Each term is used only once.

1. the matter through which a sound wave moves A. sound wave
2. how high or low a sound seems to be B. hertz

3. a measure of the energy in a sound wave C. material

4. a system that uses sound waves to locate underwater objects D. cochlea
5. the unit of sound-wave frequency E. pitch
6. a structure in the inner ear F. decibel
G. sonar
7. the measuring unit of the loudness of sounds
H. amplitude
8. a series of rarefactions and compressions

9. What is echolocation?

10. What do the vocal cords do?

Mo10-L4: Key Concept Check

Direction: On each line, write the term from the word bank that correctly completes each sentence.
Each term is used only once.

amplitude decibels echolocation energy frequency
longitudinal material sonar vibrations wavelength

1. Sound waves are produced by .

2. Sound waves are a type of wave .

3. All sound waves need a(n) to travel through.

4. and can be used to describe a sound wave.

5. The amount of a sound wave carries depends on its .

6. The loudness of a sound is measured in units called .

7. A system that uses sound waves to detect underwater objects is called .

8. Some animals use a method called to navigate and hunt.

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