Vocabulary
an alphabet with letters that are represented by long and short signals of sound or light
Morse code
Sound waves travel slowest through
Gas
Tsunamis have a short wavelengths
false
Why are radio waves a good way to transmit information over long distances?
They do not degrade
the valley, or lowest point, of a wave
Trough
the matter through which a wave travels
Medium
They have short wavelengths and low energy.
gamma rays
Through which
medium do waves travel
best?
Solid
Finish the pattern: dit-dah dit-dit dit-dah
dit-dit
the distance between one point on a wave and the same point on the next wave (crest to crest or trough to trough)
Wavelength
maritime
Sea related
The height of a wave from rest position
amplitude
What happens when two waves crash
into each other?
The amplitude
increases.
Why was the telegraph so popular?
Messages travelled instantaneously.
the form in which energy is transported through particles that make up matter
Wave
a thin piece of skin in the ear
Eardrum
Air particles travel
in waves.
False
The wave travels along the boundary between two mediums
Surface wave
Pony Express or Telegraph? Which is older?
Pony Express
a longitudinal wave that is made by an earthquake
P Wave
scientist who studies the ocean
Oceanographer
The highest point of a wave
crest
What happens when a wave runs out of energy?
It can no longer travel
Each advancement in technology makes communication
Faster
longitudinal wave that is made by an earthquake
Tsunami