What is a wave?
What does a wave transfer: matter or energy?
Energy
Which wave has crests and troughs?
Transverse wave
This has the SI Unit Measured in hertz (Hz)
Frequency
What causes sound?
Vibrations
What changes during the Doppler Effect?
Frequency (perceived pitch)
What must a mechanical wave have in order to travel?
Medium
Which wave has compressions and rarefactions?
Longitudinal wave
This affects loudness
Amplitude
Why can’t sound travel through space?
There is no medium / no particles
Higher pitch when…
Approaching (getting closer)
Why is sound considered a mechanical wave?
Requires particles (medium)
What type of wave is sound and why?
Longitudinal because particles vibrate parallel to the wave direction.
This affects pitch
Frequency
Fastest medium for sound and why
Solids, because particles are closer together
Does sound speed change?
No, speed stays the same in the same medium
Explain why waves do not move matter forward.
Particles vibrate in place
Identify the wave type from compressions moving forward
Longitudinal wave
If frequency increases, wavelength…
Decreases
Why doesn’t hitting a drum harder change pitch?
It changes amplitude, not frequency
Why pitch changes but amplitude may not
Motion changes how often waves reach you, not wave size
Give an example of a mechanical wave and explain why it is mechanical.
Sound Waves, Water Waves, and Seismic Waves. These waves require a medium.
How do Transverse waves move?
Perpendicular (Particles move up and down or side to side)
Difference between frequency and amplitude
Frequency: How often waves occur
Amplitude: Size of vibration/energy
Explain sound traveling from speaker to ear
Vibrations move through air particles transferring energy to the ear
Explain Doppler Effect with ambulance using science vocabulary.
Approaching = higher pitch
Moving away = lower pitch
Due to frequency change