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Vocabulary Words (Lessons 4-8)
SCIENCE 5TH Grade
20
Science
5th Grade
10/16/2009

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Term
amplitude
Definition
the distance from the crest (or trough) of a wave to its resting position
Term
lens
Definition
a piece of glass or other transparent material that can bend parallel rays of light so that they focus at a single point
Term
frequency
Definition
the number of waves that pass a point in a period of time (speed)
Term
wavelength
Definition
the distance between two identical points on two adjacent waves
Term
primary colors of light
Definition
red, green, blue
Term
transverse wave
Definition
the type of wave in which light and electromagnetic energy travel
Term
energy
Definition
the ability to cause change
Term
echo
Definition
sound that bounces back
Term
compression wave
Definition
a wave that compresses (sound moves in this type of wave)
Term
compression
Definition
the area of a wave where vibrating particles are close together (packed densely)
Term
electromagnetic spectrum
Definition
radio waves, infrared, visible light, ultraviolet, x-rays, gamma rays
Term
trough
Definition
the lowest point of a wave
Term
crest (peak)
Definition
the highest point of a wave
Term
rarefaction
Definition
the area of a wave where vibrating particles are not close together (packed loosely)
Term
amplify
Definition
to make louder
Term
pitch
Definition
the highness or lowness of a sound (determined by frequency)
Term
tension
Definition
tightness
Term
resonance
Definition
resound, sound again
Term
vibration
Definition
the rhythmical and steady movement to and fro
Term
visible spectrum/light
Definition
the colors we are able to detect with our eyes
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