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BJU PhysicalWorld 19 Word Scramble

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BIOL3326 Forms

Question	Answer
acoustics	The effect of materials and their shapes on sound.
amplitude	The distance that a wave rises or falls from its normal rest position.
beats	The destructive interference of two sound wave with slightly different frequencies and similar amplitudes.
compressions	A region where air molecules are pushed closer together than normal by the energy of a wound wave.
decibels (db)	The smallest difference in intensity between two sounds that the human ear is capable of detecting.
Doppler effect	The effect of motion on sound; named in honor of the Austrian physicist Christian Doppler.
Echolocation	Animals use this to find prey by sending out a high-pitched frequency which bounces off the prey.
frequency	The number of waves that pass a given point in one second.
infrasonic waves	Sound waves that are too low in frequency for the human ear.
loudness	Related to intensity; how strong or weak a sound is to an observer.
pitch	The distance between two adjacent threads on a screw; how high or low a tone sounds to an observer (related to frequency).
rarefactions	A region where the air molecules are spread apart by the energy of a sound wave.
resonance	The transfer of energy from one object to another object with the same natural frequency.
sonar	A type of listening device that uses sound waves to locate object; sound navigation and ranging.
sound	Mechanical waves that can often be detected by our ears.
threshold of hearing	The very softest sound level that can be detected by an observer.
ultrasonic waves	Sound waves that are too high in frequency for the human ear to hear.
waves	Rhythmic disturbances that transfer energy through space or matter.