Lang-Waves, sound & EM spectrum
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22 terms
Terms | Definitions |
|---|---|
 A mechanical wave is caused by | forces creating a disturbance in a medium |
| When a wave moves across a pond, it transfers | water molecules up and down and energy across the pond |
| A transverse wave transfers energy | at right angles to the disturbance |
| Cheyene is using a rope to make waves. If he increases the speed with which he creates the disturbance, he will | Increase the frequency of the waves |
| A scientist measures a wave that has a wavelength of 0.01m and a frequency of 200 waves/s. What is the wave's speed? | 2 m/s |
| A scientist measures the height of waves compared with the surface of a calm ocean. He is finding the waves' | amplitude |
| Dylan put one end of a stick into a pond. When he looked down at the stick, it appeared to be broken at the point where the stick entered the water. This was caused by the | refractrion of the light waves passing from from air into water |
| Constructive interference occurs when the | crests and troughs of two waves align exactly |
| A sound wave is produced by the | vibration of an object |
| sound waves transfer energy by | pushing air particles |
| In order to change the pitch of a sound, you should change its | frequency |
| The larger the amplitude of a sound wave the more the | intensity (loudness) of a sound |
| Unlike mechanical waves, electromagnetic waves can transfer energy | through empty space |
| Most of the visible electromagnetic waves on Earth come from | the Sun |
| As a mechanical wave travels, it loses energy. As an electromagnetic wave travels in a vacuum, it | keeps the same energy |
| An EM wave is caused by the vibration of | electric and magnetic fields |
| Which of the following shows the EM waves in order from lowest to highest frequency? | infrared llight, ultraviolet light, gamma rays |
| The heat of a toaster is transferred by | infrared light |
| Mckenzie looks out a window. The window is clear, or transparent. Most of the light that hits it is | transmitted |
| An apple looks red because it | reflects red light and absorbs other colors |
| Which type of EM waves have the lowest frequency? | radio waves |
| Which type of EM wave has the highest frequency? | gamma waves |
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