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3.3
Question | Answer |
---|---|
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 |