Vocabulary
What is a crest?
The highest point in the wave
A wave moves along what?
Matter
What is a vibration wave?
Moving back and forth quickly
What is Morse Code?
A series of dots and dashes to translate a message
Which of these best describes frequency?
The number of vibrations per unit time
What is a wave?
A repeating pattern of moving water
What is wavelength?
The distance between two crests or troughs
How do our ears hear?
The sound causes your eardrum to vibrate and then we hear the sound
Why is Morse Code important?
It allows you to send messages over long distances.
What is the distance between two crests called?
The wavelength
What is a trough?
The lowest point of the wave
What do the crest and trough tell us about a wave?
When a guitar string is plucked, sound is produced by
The vibrations of the string
A telegraph sends messages through
electrical signals
Water waves, waves on a string, and sound waves all
a. moves in circles
b. moves side to side
c. push matter together and spread it apart
d. spread apart in all directions
d. spread apart in all directions
What is frequency?
The amount of waves in a certain amount of time
What is one way you can increase the wavelength, if two people are pulling at the rope up and down at the same time?
One student moves the end of the rope more slowly.
When a firecracker explodes, sound travels
in two directions, downward and upward.
Dots and dashes are translated into...
letters and numbers
What are breaking waves?
waves that fall forward with a splash
What is amplitude?
How far a wave moves from its rest position (large)
How is frequency measured?
Hertz
How does your ear hear sound?
The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear.
How are Morse Code messages sent?
Messages are sent by tapping, drumming, buzzing, clicking, or flashing light
In which of these waves does matter move only from side to side
waves on a string