Across
- 3. - the matter a wave travels through (solid, liquid, or gas).
- 5. waves – a wave that requires a medium. Transfers energy as the particles in the medium move (vibrate) up and down or back and forth as the wave travels through it.
- 6. Effect – the phenomenon of a change in the observed frequency of a wave, sound or light, that occurs when the source and observer are in motion relative to each other. For example, when a sound source moves toward a listener, the pitch, or apparent frequency, of the sound increases. This is because the sound waves are compressed closer together and reach the listener with a higher pitch. As the sound source passes by the listener and moves away from the listener, the same sound waves are stretched farther apart. This results in a decrease in the pitch, or apparent frequency.
- 8. – are disturbances that repeat the same cycle of motion and transfer energy through matter or empty space.
- 10. Interference – type of interference that occurs at any location along the medium where the two interfering waves have a displacement in the same direction resulting in a larger amplitude.
- 12. Interference – a type of interference that occurs at any location along the medium where the two interfering waves have a displacement in the opposite direction resulting in a smaller amplitude.
- 17. - is a point on a medium through which a longitudinal wave is traveling that has the maximum density. In other words, it is a region where the coils are pressed together in a small amount of space.
- 20. Waves – electromagnetic waves just beyond the visible spectrum of light.
- 21. - takes place when a wave passes from one medium into another at an angle and bends (changes direction) due to a change in speed.
- 22. - a unit of frequency equal to one cycle per second.
- 24. - occurs when a wave hits an object that it cannot pass through or when it reaches the boundary of the medium of transmission. Both situations involve the return of the wave as it bounces off the object or medium boundary.
- 25. wave - is a wave in which the particles of the medium are displaced in a direction parallel to the direction of energy transport.
- 26. - the maximum amount of displacement of a particle on the medium from its rest position. In other words, the amplitude is the distance from rest to crest or rest to trough.
- 28. Waves – electromagnetic waves that have shorter wavelengths than visible light.
- 30. - the lowest point within a cycle of a wave.
- 31. – results when a wave passes through a hole or moves past a barrier and spreads out in the region beyond the hole or barrier.
- 32. - is the number of complete waves, or cycles of oscillation, in a given period of time. The unit for frequency is Hertz, which is equal to one wave per second.
- 33. wave- is a wave in which the particles of the medium are displaced in a direction perpendicular to the direction of energy transport.
Down
- 1. - the distinctive quality of a sound, dependent primarily on the frequency of the sound waves produced by its source. (for example, high pitch or low pitch)
- 2. Rays – electromagnetic waves that have the smallest wavelengths and the most energy of any wave in the electromagnetic spectrum.
- 4. Spectrum - the continuous range of frequencies that electromagnetic waves exist. The longer wavelength, lower frequency regions are located on the far left of the spectrum and the shorter wavelength, higher frequency regions are on the far right.
- 7. – measures how fast a wave is moving. In electromagnetic waves, the speed is directly proportional to the frequency and wavelength of the wave according to the relationship v = f λ.
- 9. – tiny packets of energy
- 11. – occurs when two or more waves arrive at the same point at the same time. As a result, they combine to produce a single wave. This new wave will have different properties from the two waves that composed it.
- 13. waves – a wave that is capable of transporting energy through the vacuum of outer space. Electromagnetic waves are produced by a vibrating electric charge and as such, they consist of both an electric and a magnetic component.
- 14. waves – electromagnetic waves that have the longest wavelengths, lowest frequency, and least amount of energy in the electromagnetic spectrum.
- 15. - is the distance between two consecutive crests or troughs of a wave.
- 16. – electromagnetic waves that have higher energy and much shorter wavelengths than ultraviolet light. Scientists usually refer to x-rays in terms of their energy rather than their wavelength.
- 18. Light Waves – the portion of the electromagnetic spectrum that we can see.
- 19. - is a point on a medium through which a longitudinal wave is traveling that has the minimum density. In other words, it is a region where the coils are spread apart, thus maximizing the distance between coils.
- 23. – electromagnetic waves found at the higher frequency end of the radio waves on the electromagnetic spectrum.
- 27. - the time it takes to complete one full cycle.
- 29. - the highest point within a cycle of a wave.