Vocab
The highest point of a wave
What is a crest?
What is a mechanical wave?
A mechanical wave is a wave that requires a medium to travel.
What is an electromagnetic wave?
An electromagnetic wave is a wave that does not require a medium to travel.
True or False: Waves transfer energy, not matter.
True!
The number of waves that pass a fixed point in one second.
What is frequency?
The lowest point of a wave
What is a trough?
What are the two types of mechanical waves?
Transverse and Longitudinal/Compressional
List 3 out of the 7 types of electromagnetic waves
Radio, Microwave, Infrared, Visible Light, UV, X-Ray, Gamma
Explain the difference between an electromagnetic wave and a mechanical wave.
What is the difference between reflection and refraction?
Reflection is when a wave bounces off a surface and changes direction.
Refraction is the bending of a wave as it passes from one medium to another.
The substance or material in which a wave travels
What is a medium?
Describe the difference in the movement of transverse waves and longitudinal waves.
Transverse waves move and and down, motion is perpendicular to matter. Longitudinal waves move side to side, motion is parallel to matter.
Describe what happens to wavelength as you move from radio waves to gamma waves on the EM Spectrum.
Wavelength decreases as you move to Gamma Waves.
If an astronaut drops a hammer in outer space, can he hear a sound? Why or why not?
The astronaut will not be able to hear a noise because he is in outer space. There is no air (no medium) in outer space to carry the sound (mechanical wave).
What happens to the amplitude when you add energy to a transverse wave?
It increases.
When a wave bounces off a surface and changes direction
What is Reflection?
Labeling!! On your team's white board, draw a transverse wave and label a crest, trough, amplitude, wavelength, and resting position.
Ms. L will verify if correct!
What happens to frequency as you move from Radio Waves to Gamma Waves on the EM Spectrum?
Frequency increases as you move from radio waves to gamma waves.
Explain how the stadium phenomena (fans standing and sitting) is an example of energy moving energy, not matter.
The fans act as molecules of matter in the medium, moving up and down-transferring energy to the next person (molecule).
Think back to our stations activity- Explain why the pencil looked bent in the beaker of water.
The water caused the image of the pencil to refract, the result is a "bent" pencil.
The change in frequency of a wave that occurs when the source of the wave is moving in relation to the observer.
What is the Doppler Effect?
Labeling! On your team's whiteboard, draw a longitudinal wave and label a compression, rarefaction, amplitude, wavelength, and resting point.
Ms. L will verify if correct.
What happens when you add energy to an Electromagnetic Wave?
When energy is added to an electromagnetic wave, frequency increases and wavelength decreases
Can a skyscraper melt a taxi cab? How?
Yes, a skyscraper can melt a taxi cab. The sunlight can reflect from the building onto the cab, if the reflection is strong enough, it can cause damage to the cars.
Explain why we are able to see color.
EMW interact with an object's molecules (half points).
The object absorbs all colors (ROY G BIV) and reflects the color we see. (example; grass absorbs all the colors and reflects green)