Waves

Waves

1. Oscillations or vibrations which have an amplitude, wavelength and frequency. The top is the peak/crest and the bottom is the trough. Waves transfer energy but not matter.

2. Amplitude

   • The distance from the middle to the top (or bottom) of the wave - often referred to as the height of a wave.

3. Wavelength

   • The distance between one peak and the next and determined the pitch of a sound.

4. Frequency

   • The number of waves passing a specific point every 1 second, measured in Hertz (Hz).

5. Pitch

   • The pitch of a sound depends on the frequency.

6. Echo

   • A reflection of sound which can be used to calculate the distance.

7. Ultrasound

   • Sound with a frequency greater than 20,000Hz, used to determine the depth of the ocean or produce images of inside the human body.

8. Infrasound

   • Sound with a frequency less than 20Hz, used by some animals for communication and by scientists to detect volcanic eruptions.

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