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# 3.3

All waves begin with a source of____. energy
A____ is a disturbance that transfers energy from one place to another. wave
Matter ____ transferred as a wave moves is not
When a flag waves in the wind, the flag ripples back and forth as the energy ____ along the flag. travels
A ____ wave travels only though matter. mechanical
An ____ wave can travel through empty space or through matter. electromagnetic
There are ____ types of wave motion. three
A ____ wave is a wave that makes the particles of a medium move back and forth parallel to the direction the wave travels. longitudinal
Two common waves in nature are water waves and ____ waves. seismic.
In water waves, water particles move in ____. circles
The ____ of a wav is the distance from one point, such as the crest. wavelength
The ___ of a wave is the number of wavelengths that pass a point each second. frequency
Frequency is measured in ____. hertz
Wave speed depends on the type of material, or ____, a wave travels through. medium
The maximum distance a wave varies from its rest position is the ____ of the wave. amplitude.
When you knock on one side of a door, the sound travels as ____ sound waves through the door. longitudinal
These waves travel through the ____ that makes up the door to the air on the other side. matter
The particles that make up the door ____ some of the sound energy. absorbs
They increase their motion, changing to ____ energy. thermal
This causes a ____ in the sound. decrease
Some of the energy of your knock bounces, or ____ back into the room. reflects
That is why you ____ the sound. hear
Waves that bounce off the surface follow the law of ____. reflection
____is the change in direction of a wave as it changes speed. Refraction
When entering a medium, waves refract toward the normal if they____. slow down
The change in direction of a wave when it travels past the edge an object or through an opening is called ____. diffraction
Created by: petrooli2672