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Science 2
Science Chapter 13
| Question | Answer |
|---|---|
| A wave is a | distrubance that transfers energy from one place to another. |
| Water that moves up and down traveling in a wave is known as a | disturbance which is transferring energy. |
| Forces | can start disturbances that send waves through a materail. Examples: ropes, water and earthquakes. |
| Mediums | substances which waves move through. |
| Sound waves move through | air. |
| Mechanical waves | move energy through matter |
| Water, the ground, rope and air are all made up of | matter. |
| Light is a wave that transfer energy | through empty space. |
| Waves caused by an earthquake are good examples of | energy transfer |
| Longitudinal waves travel | in the same direction as the disturbance. |
| Transverse waves travel | perpendicular to the direction of the wave. |
| Waves have | amplitude, wavelength and frequency. |
| Crest | highest point of a wave |
| Trough | lowest point of a wave |
| amplitude | from the middle of the wave to the top or bottom of the wave |
| wavelength | distance from one waves crest to the next waves crest |
| frequency | the number of waves which pass a fixed point in a certain amount of time. |
| As frequency decreases | wavelength increases. |
| Speed= | wavelength times frequency |
| Light waves travel 1,000,0000 times faster than | sound waves. |
| Reflection | boucing back of waves |
| Refraction | bending of wave as it enters a medium |
| diffraction | spreading out of waves through an opening |
| interference | meeting and combining of waves |
| constructive interference is | the adding of 2 waves |
| destruction interference is | the subtraction of energy. |