EM Spectrum
This type of wave does not need matter to transfer energy.
What is an electromagnetic wave?
Sound travels fastest in a _______
SOLID
When waves bounce off of an object
What is reflection
What carries energy from one place to another without moving matter?
A wave
The only part of the EM spectrum we see is _______________.
Visible Light
An Electromagnetic wave travels fastest in a _______.
Gas or a vacuum where there are no atoms to slow it down.
The type of wave that makes up sound waves
What is longitudinal or compressional
When a wave hits an object and then goes around the object, it is ________________.
What is diffracted
What happens to wavelength when frequency increases?
Wavelength decreases
We see different colors because our rods pick up the different wavelengths that are ___ from an object...
What is reflected
All colors of light hit the object and are absorbed except the color we see, which reflects and goes into our eye.
How is the energy on the EM spectrum organized? From ______ to ______
longest wavelength to shortest; from slowest to fastest
The matter that mechanical waves travel through is known as ____________.
What is a medium?
What kind of wave has energy that is perpendicular to the motion of the matter.
What is transverse
What direction(s) does a transverse wave move?
Up and down + wave direction
Why is light classified as an electromagnetic wave and not a mechanical wave?
It does not need a medium
What color of light has the longest wavelength (least amount of energy)?
Red
What are the two main parts of a sound wave?
Compressions and rarefactions
Height of a wave from resting position
What is amplitude?
What direction does a longitudinal wave move?
Back and forth+ wave direction
A student says wavelength measures how tall a wave is. What is wrong with this statement?
Wavelength measures length, not height
What is the most dangerous part of the EM spectrum that can harm us?
Gamma Rays
The term for what a bat uses to find its food, what wave behavior is used?
What is echolocation or echo
Number of waves per second
What is frequency?
How would increasing the amplitude of a sound wave affect what we hear?
The sound would be louder
How does changing the medium affect the speed of a wave?
Different particle spacing changes speed
This type of EM energy is has the highest energy while this type has the lowest energy
What are gamma rays and radio waves?
Why can't sound travel in space or a vacuum?
Sound must have atoms (especially gas atoms) in order to travel, and there are no atoms in a vacuum or space.
when one object vibrates at the same natural frequency of a second object and forces that second object into vibrational motion
What is resonance
Two sound waves travel through air. One has higher frequency. How will it sound different to our ears?
It will sound higher pitched
A bell is ringing inside a jar. The air is slowly removed, and the sound gets quieter. Explain why this happens.
Sound needs particles to travel, and removing air removes the medium.