Wiggle Wobble
(Sound Wave Facts)
(Sound Wave Facts)
What is the name for this type of wave? (Left board)
Transverse wave
This term relates to the amount of energy of a wave. For sound waves, affects the volume.
Amplitude
The top part of a transverse wave.
Crest
What are the positive and negative ends of a magnet called?
Earth's core is primarily made of this magnetic material.
Iron
What is the name for this type of wave? (Right board)
Number of waves per second.
Relates to pitch.
Measured in Hz.
frequency
Hertz = waves / seconds
Mr. McCarthy went fishing this weekend and counted 25 waves travel past his boat over 5 seconds. How many Hz did he see?
5 hz
There are bar magnets, horseshoe magnets, and _______.
electromagnets
Why does the Earth's North pole attract the South end of magnets?
Opposites attract. (or something similar)
What is the bottom of a transverse wave called?
Trough
Sound is a mechanical wave, which means it needs a ____ to travel through.
In a longitudinal wave, the particles of the medium move ____ to the direction of the wave's energy.
Parallel
Which of these do NOT affect magnets?
Proton, Neutron, Electron
Neutron
Name one general function of Earth's magnetic field.
Navigation or Protection
What is the name of the non-compressed part of a longitudinal wave? (Remember, it's fun to say with a country/southern accent).
Rarefaction
The distance between two crests or two troughs.
Wavelength
As the frequency of a wave goes up, the wavelength goes down. This means frequency and wavelength are...
Inversely prope
More coils on an electromagnet = _____ magnetic force.
Stronger
Hertz = waves/seconds
A sound wave has 30 crests travel within 2 seconds. What are the hertz of this wave?
15 Hz.
In human ears, these cells are the cells that pick up the sounds that we hear. (Bats have them, too!)
Hair cells
In a transverse wave, the particles of the medium move ______ to the direction of the wave's energy.
perpendicular
What is the shape of waves from a source?
Sphere
The area around a magnet that influences magnetic objects
Field or magnetic field
This happens when sound waves travel through an opening and spread out.
Diffraction