Show:
EM waves
Speed n light from sun
Radio waves
Visible Light
Extra
100
A type of energy.
What is Light ?
100
EM.
______ from the sun are the major source of energy on earth.
100
Radio waves
Waves used for broadcasting radio signals are Called ___ ___.
100
Visible Spectrum
What can cause all the colors of visible light to be seen in a rainbow ?
100
Radio Detection and Ranging.
What do the letters radar stand for ?
200
Electromagnetic.
A wave that consists of changing electric and magnetic fields and that can travel through empty space is an ________.
200
8.3 Minutes.
How long does it take light to travel from the sun to earth ?
200
Frequency-modulated.
Which kind of radio waves are used by TV stations to carry sound ?
200
White light.
The visible light of all wavelengths combined is ____ ____ ?
200
Buildings, you, and trees.
Name 3 sources of Infrared waves !
300
Perpendicular.
The electric and magnetic fields of an electromagnetic wave are _______ to each other and to the direction of the waves motion.
300
300,000,000 m/s or 300,000 km/s.
What is the speed of light in the near vacuum of space?
300
Modulated.
Changing the amplitude or frequency of waves is called ________.
300
Red
What color is the longest wavelengths of visible light ?
300
Ultraviolet light
What kind of Light can a bee see that you can not see ?
400
Oppistely charged and like-charged.
An electric field pulls ___ ___ objects toward it and repels ___ ___ objects.
400
The sun gives off energy as Em waves in all directions.
Why does only a small part of the total energy given off by the sun reach earth ?
400
Amplitude-modulated.
Which kind of radio waves are used by TV stations to carry pictures ?
400
Shorter wavelengths and higher frequencies that infrared waves.
In what ways are the wavelengths of visible light different from infrared waves ?
400
Radio stations encode sound information into radio waves by varying either the waves amplitude or their frequency.
How are radio signals broadcast ?
500
Around certain objects and can exist a force on another object without touching that object.
Where do fields exist and what do they do ?
500
Plants use Photosynthesis to store energy from the sun. Animals use and store by eating plants or by eating other animals that eat plants.
Describe 2 ways in which the sun's energy is used on earth ?
500
Cause FM radio waves are less effective by electrical noise than AM radio waves are.
Why does music broadcast from FM stations sound better than music broadcast from AM stations ?
500
Roy- Red, Orange, Yellow. G- Green. Biv- Blue, Indigo, Violet.
What does each letter in the imaginary name ROY G BIV stand for ?
500
Radio waves Microwaves Infrared Visible light Ultraviolet X-rays Gamma rays
Name and arrange the seven kinds of EM waves in order from long wavelength to short wavelength !