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It’s Just a Phase
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description
It’s Just a Phase. Have you noticed the Moon changes appearance each night?. Why?. I’m glad you asked!. Let’s look at the Moon!. First some important terms. Waxing – The moon appears to be getting larger. . Waning – The moon appears to be getting smaller. . Gibbous – Between half and full. - PowerPoint PPT Presentation
Transcript of It’s Just a Phase
The Electromagnetic
Spectrum
What is the electromagnetic spectrum?
It is the range of wavelengths or frequencies over which electromagnetic
radiation extends.
Term - WavelengthThe length of one wave.
The wavelength determines the type of electromagnetic
energy.
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Gamma Rays
Given off by stars and some radioactive material.
Kill cancer cells.
Cause cell damage and mutations.
Parts of the Electromagnetic SpectrumName How
They’re Made
Uses Dangers
X-rays Produced by stars and special machines designed to produce x-rays.
To see inside people and things.
Can cause cell damage and cancer.
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Ultraviolet Rays
By special lamps or given off by stars.
Sun tan booths, kill microbes, cause body to produce Vitamin D.
Damage eyes, produce sunburns, cause cancer
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Light Produce by anything hot enough to glow.
See things.
Too much light can damage the retina.
Parts of the Electromagnetic SpectrumName How
They’re Made
Uses Dangers
Infrared Given off by hot objects.
Remote controls, heal the body, used in alarm systems, thermal imaging.
Cause cell damage and mutations.
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Microwaves
Produced by a transmitter.
Cook foods, mobile phones, radar.
Cause cataracts, affect parts of brain.
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Radio waves
Transmitters.
Communication
May cause cancer.
Parts of the Electromagnetic Spectrum
Name How They’re Made
Uses Dangers
Radio waves
Transmitters.
Communication
May cause cancer.
High Frequency Low Frequency
The Presentation Ends Here.
