EM Spectrum
An Electromagnetic wave travels fastest in a _______.
Gas or a vacuum where there are no atoms to slow it down.
Sound travels fastest in a _______ (solid, liquid, or gas) because of the DECREASED distance between the particles.
SOLID
When waves bounce off of an object
What is reflection
An object that is ____________ cannot be seen through. ( Opaque, Transluent, Transparent)
What is opaque?
The human version of echolocation is called _______.
What is SONAR?
How is the energy on the EM spectrum organized? From ______ to ______
longest wavelength to shortest; from slowest to fastest,least energy to most energy
What unit is the loudness of a sound measured in?
Decibels
When a wave hits an object and then goes around the object, it is ________________.
What is diffracted
What wave is used in communications?
Microwave or Radio
The only part of the EM spectrum we see is _______________.
Visible Light
What color of light has the longest wavelength (least amount of energy)?
Red
The type of wave that makes up sound waves
What is longitudinal or compressional
What is a light particle called?
Photon
TIC stands for ___ and detects __ on the electromagnetic spectrum (hint:it is used in the military and involves heat)
What is thermal imaging camera and infrared
Our _________ vibrates first to allow the energy to pass on for us to hear.
Eardrum
What is the most dangerous part of the EM spectrum that can harm us?
Gamma Rays
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 light rays come together.
What is converge or combine
The term for what a bat uses to find its food
What is echolocation
We see because light is _____________
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.
The speed of a wave is measured by how close the crests are or _________ measured in Hz. This is also inversely related to wavelength.
Frequency
True or false. Light is can travel as both a wave and a particle.
True
The range of all electromagnetic frequencies
What is the electromagnetic spectrum
We see the color of a red apple because the apple _________ red ? ( absorb or reflect)