Vocabulary
What is a wave?
a disturbance that transfers (moves) energy from one place to another
The crest of a wave is __________________.
The highest part of a wave
Can light waves travel through a vacuum?
Yes! They can travel through a vacuum because light waves are electromagnetic waves.
Do sound waves travel at the same speed through solids, liquids and gases?
No!
They travel quickest through solids, then liquids, then gases.
Waves do not carry matter, they carry ____________.
Energy
Frequency means __________________.
The number of waves in a certain amount of time
What is the highest part of a wave called?
Crest!
Be sure to label this on your study guide.
What is an object that allows light to pass through?
transparent
Sound travels through _____________.
All waves need a medium to travel.
A. True
B. Not all electromagnetic waves can travel in a vacuum.
C. Not all, mechanical waves can travel in a vacuum.
C. Not all, mechanical waves can travel in a vacuum.
How does a transverse wave travel or move?
Transverse waves move up and down.
What is the lowest part of a wave called?
Trough.
Be sure to label that on your study guide.
What color is formed when all the colors of light are combined?
White
True or False: In order for sound waves to travel, there must be vibrations OR a medium.
False!
In order for sound waves to travel, there must be vibrations AND a medium.
An apple looks red to you because light is ____________.
absorbed
How does a longitudinal wave travel or move?
Longitudinal waves move back and forth.
What is the distance between waves called?
Wavelength.
Be sure to label that on your study guide.
What are TWO natural sources of light?
Sun and Stars
What type of wave is a sound wave? Is it transverse or longitudinal?
It is transverse. Sound waves move up and down.
What type of code uses two signals?
Morse Code
What's the difference between a longitudinal wave and a transverse wave?
Longitudinal waves move back and forth, while transverse waves move up and down. Transverse waves also must have a medium in order to travel.
The distance from the equilibrium (dotted line) to the crest is called the wave's _____________.
amplitude
What is an opaque object? Give at least two examples.
cardboard, metal, brick, wood, plastic, ect.
Look at the pictures on #17 of your study guide. Which wave has a higher pitch? How do you know?
The first wave has a higher pitch. I know this because there are more waves, the waves are close together (wavelength is short) and the waves have a higher amplitude.
Which type of wave is used in communication devices?
Radio waves