Sound
What does sound travel through?
Solids, Liquids, and Gases
What does sound not travel through?
Vacuum
What causes sound?
Vibrations
What does one complete wavelength look like?
What does a wave with a low pitch look like?
What does a wave with a high pitch look like?
What is the top of a wavelength called?
Crest
What is the bottom of a wavelength called?
Trough
How do we measure wavelengths?
From Crest to Crest
Why does sound travel faster along a metal fence than a swimming pool?
The molecules are closer together in a solid
How is the sound you hear underwater different from the sound you hear in air?
The sound underwater travels faster than in the air
What is the number of times a sound vibrates in one second called?
Frequency
What is the highness or lowness of a sound called?
Pitch
What is the relationship between pitch and frequency?
The greater the frequency, the higher the pitch
What pitch do shorter strings produce?
High (they vibrate faster)
What pitch do longer strings produce?
Low (they vibrate slower)
What do animals use to help detect objects?
Echolocation
Why can’t people hear some sounds that animals can?
The pitch is either too high or too low
What device is used to detect objects moving through air or space?
Radar
What type of device is used to locate objects moving underwater?
Sonar