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3.3
| Question | Answer |
|---|---|
| All waves begin with a source of ______. | energy |
| A _____ is a disturbance that transfers energy form one place to another. | wave |
| When a flag waves in the wind, the flag ripples back and forth as the energy _______ along the flag. | travels |
| A ________ wave travels only through matter | mechanical |
| Matter __________transfers as a wave moves. | doesn't |
| A _________ wave can travel through empty space or through matter. | electromagnetic |
| There are three types of wave motion- transverse, __________, and a combination of both. | longitudinal |
| A ____ wave is a wave which the disturbance is perpendicular to the direction the wave travels. | transverse |
| 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 |
| The ______ of a wave is the distance from one point, such as the crest, to the corresponding point to the next wave. | wavelength |
| The ______ of a wave is the number of wavelengths that pass a point each second. | frequency |
| Frequency is measured in ______ (Hz) | 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 it the _________ of the wave; the more energy a mechanical wave has. | amplitude |
| When you knock on one side of the 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. | air particles |
| The particles that make up the door _______ some of the sound energy; they increase their motion changing to thermal energy. | absorbed |
| This causes a _____ in the sound. | decrease |
| Some of the energy of your knock bounces, or _______, back into the room. | reflects |
| This is why you ______ the sound | hear. |
| Waves that bounce off a surface follow the law of _______ . | reflection |
| The angle between the _______ (incoming) wave and the normal is equal to the wave between the reflected wave and the normal. | incident |
| ________ is the change in the direction of a wave as it changes speed, moving from one medium into another. | refraction |
| When entering a medium, waves refract toward the normal if the __________. | slow down |
| And away from the medium the ___________ | speed up |
| The change in direction of a ______ when it travels past the edge of an object or through an opening is called diffraction | wave |
| Sound wave spread around a ______ due to diffraction. | corner |
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mathelai4079
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