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High/low notes have high/low frequency, not high/low amplitude.Heartz measures the number of waves per second, not per hour.Sounds do not travel in space because it's emptySounds make our eardrum vibrate. The diaphragm is the muscle we use to breathe.Soft, pale materials are best for sound proofing because they absorb the waves.In the next paragraph, ultrasound and infrasound are inverted (ultra means "over, above" and infra means "below").

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.