| A | B |
|---|
| Radio wave uses | radio broadcasts |
| Microwave uses | heating food |
| Infrared uses | heating light bulbs (for fries, etc.) |
| Visible Light uses | Allows us to see |
| Ultraviolet rays uses | gives us a glorious tan! |
| X-rays uses | can see our bones, broken or not |
| gamma rays | used to zap tumors |
| compression wave example | slinkies or flicking a line of pennies |
| transverse wave example | holding a rope and whipping it to make a wave |
| compression wave energy direction | energy moves in the same direction as the wave |
| transverse wave energy drection | energy moves a right angles to direction of wave |
| Compression | where molecules are pushed closer together |
| rarefaction | where molecules are more spread apart |
| Dense material | speed travels faster through this |
| frequency | vibrations per second |
| Hertz | unit for frequency |
| wavelength | distance from one crest to the next |
| Low frequency | a lower sounding note |
| high frequency | a higher sounding note |
| Range of sounds humans can hear. | 20-20,000 Hz. |
| Range of sounds people can produce | 85 - 1,000 Hz. |
| Oscilloscope | tool used to measure waves |
| Natural frequency | Vibrations an object has if it were to vibrate on its own |
| Formula for the speed of sound (tuning fork activity) | wavelength (distance/wave) x frequency (waves/time) = speed of sound (distance/time) |
| Amplitude definition | height of wave |
| Amplitude determines | Volume |
| Frequency determines | pitch of note (high or low) |
| Decibel | Unit for volume |
| Highest decibel level | 200 dB |
| Volume at which pain is produced | 120-140 dB |
| Constructive interference | when waves collide, they build upon each other |
| destructive interference | when waves collide, they fully or partially cancel each other out |
| How is sound produced in a musical instrument | vibrations are made, then the length of the instrument is changed |
| Doppler effect | as sound waves move toward you, they will sound higher, as hey move away, they will sound lower |
| Auricle | outer ear |
| Auditory canal | ear tube |
| tympanic membrane | ear drum |
| Hammer | Malleus |
| Anvil | Incus |
| Stirrup | Stapes |
| cochlea | organ responsible for converting physical vibrations to nerve signals |
| Inner ear responsibilities | balance and hearing |
| Semicircular canals | responsible for balance |
| How an echo works | Sound bounces off a relatively flat surface, and experiences almost no destructive interference |
