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sound and light
Question | Answer |
---|---|
sound energy | energy caused by vibrating particles in matter |
pitch | the highness or lowness of a sound |
frequency | the number of vibrations that occur in a unit of time |
volume | the loudness of a sound |
tuba | instrument with a low pitch and low frequency |
flute | instrument with a high pitch and a high frequency |
medicine, entertainment, every day uses, and exploration | ways we use sound |
gas | sound travels the slowest in which state of matter |
decibels | volume is measured in this unit |
85 dB | if sound reaches this number of decibels, it can be damaging to your ears |
wave | a disturbance that transmits energy |
waves | sound travels in this way |
light | form of energy that moves in waves and can travel through space |
electromagnetic spectrum | a range of light organized by frequency and wavelength |
opaque | absorbs most light.... no light passes through it |
wood, stone, metal | materials that are opaque |
transparent | absorbs very little light... most light passes through it |
clear glass, air, pure liquid water | materials that are transparent |
translucent | absorbs a little light... little light passes through it |
frosted glass, ice, wax paper | materials that are translucent |
prism | a transparent material that bends and separates white light into the colors of the rainbow |
reflection | the bouncing of light waves that reverses the image |
refraction | the bending of light waves |
straight lines | the way that light travels |