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Electromagnetic Radiation: Energy that travels through space in the form of waves at different wavelengths and frequencies.
The spectrum varies in range, decreasing in wavelength and increasing in energy. The spectrum is divided into seven regions: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma-rays. 
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Higher energy and higher temperature 
Increasing Energy and decreasing wavelength
Decreasing Energy and increasing wavelength
Lower energy and lower temperature 
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Gamma Rays:  The smallest wavelengths with the most energy of any wave in the electromagnetic spectrum. They are produced by the hottest objects in space and are produced on earth by nuclear explosions.
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X-Rays: High energy waves. Commonly used for medical imaging, airport security scanners and observing internal structures of objects.
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Ultraviolet: Transmitted in waves from the sun. Commonly used in tanning booths and too much exposure can cause skin cancer.
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Visible Light: Light that you can see with your own eyes.
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Infrared: longer waves than visible light that humans experience as heat. Night vision goggles pick up the infrared light emitted by objects with heat. Remote controls use infrared light.
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Microwave: Radiation that is commonly used to quickly cook food, however it is also used by astronomers for the research of nearby galaxies. Microwaves are also used for communications systems such as voice, data and video in both analog and digital formats and remote machinery, switches, valves and signals.
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Radio: Radios capture radio waves emitted by radio stations, giving us the ability to listen to music. Radio waves are also emitted by stars and gases in space.
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Wavelength: The distance from one crest of a wave to another.
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Frequency: The number of waves in an interval.
Lower Frequency 
Higher Frequency 
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Amplitude: Half the height of the wave.
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