Waves & Sound
A wave bouncing off a surface and changing direction
reflection
The number of wave cycles per second.
Frequency
The part of the ear that vibrates first.
Eardrum
Spoils System
What was the practice of rewarding supporters with government jobs?
Waves that can travel through a vacuum.
Electromagnetic waves
A wave bending when it enters a new medium.
Refraction
The unit used to measure frequency.
Hertz (Hz)
The three bones of the middle ear.
Hammer, Anvil, Stirrup
Pendleton Civil Service Act
What was the act ending the spoils system and requiring qualifications?
Lowest to highest frequency EM wave order starts with this.
Radio waves
The type of wave sound travels as.
Longitudinal wave
Higher frequency means higher _______.
Pitch
Using sound waves to locate objects.
Echolocation
Prohibition
What was the ban on alcohol?
As frequency increases, wavelength does this.
Decreases
The speed of sound increases when temperature does this.
Increases
The human hearing range.
20 Hz to 20,000 Hz
Technology that uses sound waves underwater.
Sonar
Plessy v. Ferguson
What was the Supreme Court case establishing “separate but equal”?
An object that produces its own light.
luminous object
Sound cannot travel without this.
A medium
Sound waves above human hearing.
Ultrasound
An image made using ultrasound.lroad
Sonogram
Progressive beliefs
What was the belief that government should be more active, accountable, and regulate big business?
Three things that can happen when light hits an object.
Reflection, absorption, transmission