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Assessment Item 2

Horizontales
Describes a sound that has a frequency too low to be heard by the normal human ear.
Describes a sound that has a frequency too high to be heard by the normal human ear.
The highness or lowness of a tone related to wave frequency.
The frequency at which an elastic object tends to vibrate when it is disturbed and the disturbing force is removed.
The three colors - red, blue, and green - that, when added in certain proportions, produce any other color in the visible-light part of the electromagnetic spectrum and can be mixed equally to produce white light.
The persistence of sound, as in an echo, due to multiple reflections.
Verticales
The setting up of vibrations in an object by a vibrating force.
A condensed region of the medium through which a longitudinal wave travels.
Any two colors of equal brightness that, when added, produce the sensation of white light.
A rarefied (of reduced pressure) region of the medium through which a longitudinal wave travels.
The bending of sound or any wave caused by a difference in wave speeds.