32 terms

# Unit 6 Waves

#### Terms in this set (...)

ENERGY
What ALL waves carry in a repeating pattern!
Example of SOUND waves being REFLECTED
Situation: Your teacher's voice hits the classroom wall and bounces (echos) back
Example of LIGHT waves being REFLECTED
Situation: White light hits a mirror and bounces back
Example of WATER waves being REFLECTED
Situation: Energy moving through a lake hits the side of a boat and bounces off
Example of SOUND waves being ABSORBED
Situation: During a concert, the band's music is taken into the curtains surrounding the stage and does not escape
Example of LIGHT waves being ABSORBED
Situation: A black t-shirt takes in all the colors of light and does not let any escape
Example of WATER waves being ABSORBED
Situation: Under water, energy is taken in by seaweed and does not escape
Example of SOUND waves being TRANSMITTED
Situation: In the hallway, you can hear a classmate's laugh pass through the closed classroom door
Example of LIGHT waves being TRANSMITTED
Situation: Sunlight is able to stream/pass through a transparent window
Example of WATER waves being TRANSMITTED
Situation: Energy is passed through a large tsunami wave when an earthquake hits the ocean
SOURCE of wave energy
The place/action where the energy/vibration (sound, light, etc.) BEGINS
Receptor/destination of energy
The point where the energy (sound waves, light waves, etc) is "sensed" by seeing, hearing, feeling, etc.
Medium
The matter/material that the wave energy travels through
Wavelength
The distance from a crest to the next crest or a trough to the next trough. One repetition/cycle of the wave.
Frequency
The TIME it takes one wavelength to complete, or how OFTEN a wave happens
Amplitude
The height from a wave's resting point (middle) to the top (a crest) or the bottom (a trough), the ENERGY in the wave
Relationship between amplitude and energy
More energy = higher amplitude; less energy = lower amplitude
the loudness (volume) of a sound
When AMPLITUDE of a sound wave is increased, we hear it as...
Visible light
The small part (less than 1%) of the electromagnetic spectrum that human eyes can detect
Less than 1%
the percentage of the light (electromagnetic) spectrum that human eyes can sense
Crest
The highest point reached from rest on a wave
Trough
The lowest point reached from rest on a wave
Stimulus
Something that causes a reaction in an organism, like light or sound
Response
The way a living thing ACTS or BEHAVES when it receives a stimulus
Electromagnetic spectrum
The ENTIRE range of visible and invisible LIGHT
Direction that waves travel from a source
Outward in all directions
Vibrations of molecules (often air)
How SOUND energy is passed from source to destination
Analog Signal
A continuously varying wave
Digital Signal
A wave is sampled into chunks and assigned values (digits)
Equilibrium
The position in which the matter would be if there was no disturbance moving through it, also called "at rest".
Matter/Mechanical waves
Sound waves, water waves, earthquake waves are all examples
Echo
When sound energy hits a surface and REFLECTS back to be sensed again