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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 |