21 terms

Stithsonianscience Sound & Light 2017-18

Basic terms for grade 6 unit on Sound.
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wavelength
the distance from one point on a wave to next same point (i.e. from crest to crest)
frequency
the number of wavelengths passing a point or the number of vibrations per second
amplitude
the height of the wave or the amount of energy in a wave
crest
the highest point on a wave
trough
the lowest point on a wave
pitch
how high or low a sound is
volume
how loud or quiet a sound is
reflection
waves bouncing off matter
transmission
waves traveling through matter
absorption
waves getting trapped by matter and changing into heat energy
sound waves
Which waves cannot travel through the vacuum of space, light waves or sound waves?
amplitude
Which of the following, amplitude or frequency, determines the loudness of sound or the intensity of light?
pitch gets higher
What happens to a sound when its frequency increases?
volume gets louder
What happens to a sound when its amplitude increaes?
light waves
Which travel faster, light waves or sound waves?
frequency
Which of the following, amplitude or frequency, determines the pitch of sound, or the color (or type) light?
all directions
In which direction do sound and light waves move away from their source?
light gets brighter or more intense
What happens to light when its amplitude increases?
Electromagnetic Spectrum
This is made up of all forms of light energy.
true
All objects you can see must reflect some light.
false
White objects heat up in the sun more than brown objects.
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