Abeka 8th Grade Science Matter and Energy Test 8

A periodic back and forth motion

the most dominant sound produced when a musical instrument plays a single note is an overtone

Waves that bounce off the object

two kinds of wave interference

A musical instruments distinct sound quality

The angle of of incidence equals the angle of reflection

Multiple reflections causing the persistence of sound not heard as separate sounds

When two notes interfere harmoniously

A sound of definite pitch

A system that uses sound to detect underwater objects

The SI unit of frequency

Waves in which particles of the transmitting medium oscillate to the direction of wave travel

The distance between two notes is an interval

sound with frequency below the range of human hearing

The substance through which a wave transfers its energy

The change in frequency caused by an object's motion

The reinforcement or cancellation that occurs when two or more waves meet

what is the most versatile and widely played instrument in modern times

The strength of a soundwave

the family of instruments in which pitch is varied by opening and closing holes in the tube is

loud noise caused by a shock wave

a hollow body that reverberates sound waves produced by an instrument to make the sound louder

The unit of sound intensity

The process of dissipating the energy of sound waves in matter

The rate at which a wave travels

sound that can be heard

when the infrequent and natural frequencies are the same or nearly the same

The set of frequencies at which an object vibrates

Know the math and essay questions!

Waves in which particles of the transmitting oscillate in the direction of wave motion

Random sound with no intended pattern

family of instruments includes the trumpet and tuba

The spreading out of a wave after it passes through a narrow opening

the law of reflection states that the angle of incidence is __________ the angle of reflection

A sound heard distinctly after being reflected from some object

A series of organized sound waves with specific pitches that have been deliberately arranged

family of instruments are played by being struck

Vibrations traveling through a medium in the form of longitudinal pressure waves

The maximum distance that particles are displaced by a wave

The sounds produced by a musical instrument at higher frequencies than the fundamental

The change in the course of a wave as a result of a collision with an object or boundary

A series of waves

The effect of frequency on the way the human ear perceives sound

Speeds above the speed of sound

The number of waves that pass a given point per unit of time

change in a waves direction when passing from one substance into another

A violent compression pulse

The time needed for one cycle to pass

The effect of intensity on the way the human ear perceives sound

Speeds below the speed of sound