Write (/) if the statement is correct and X if not.
6. Hertz is a unit of frequency of sound.
7. Thunder is a controllable noise.
8. We need plants to control the noise.
9. Decibel is a unit used to measure the intensity of a sound.
10. You can work well because of noisy environment.
6. Hertz is a unit of frequency of sound.
7. Thunder is a controllable noise.
8. We need plants to control the noise.
9. Decibel is a unit used to measure the intensity of a sound.
10. You can work well because of noisy environment.
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6. /
7. x
8. /
9. /
10. x
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