B. Encircle the letter of the best answer.
1. What is vibration?
4. how loud a sound is
3. the back and forth movement of matter
C. how high or low a sound is
D. the loudness or softness of a sound
2. What is frequency?
A. the number of vibrations per second
B. how high or low a sound is
C. the loudness or softness of a sound
D. the back and forth movement of matter
A. amplitude
B. speed of sound
A. louder
B. higher
3. Measure of how high or low a sound is
C. compression
D. pitch
4. A longer string makes a pitch than a short string.
C. softer
D. lower
5. Sound is a form of?
C. pitch
B. volume
D. intensity
6. What type of materials REFLECT sound?
A. hard materials
B. smooth materials
C. both hard and smooth materials
D. NONE of the above
A. energy
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Answer:
1. 4.
2. a.
3. d.
4. a.
5. b.
6. b.
Explanation:
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