Umonhon Nation Science : Physical Science Chapter 13: Electromagnetic Waves

Physical Science Chapter 13: Electromagnetic Waves

Vocabulary Words	Objective Questions
13-1 The Nature of Electromagnetic Waves	page 374
electromagnetic (EM) waves radiant energy magnetic field electric field wavelength freqency	How are EM waves generated? What two field surround a moving charged particle? What force field surround the earth? What are the properties of an EM wave? What is the speed of light?
13-2 The Electromagnetic Spectrum	page 379
electromagnetic spectrum radio wave infrared wave visible light ultraviolet radiation (UV) x-ray gamma ray radar microwaves ozone radiaiton	What are the seven kinds of of EM waves? What is the job of the ozone layer? How can you use the following.... Infrared? Ultraviolet? X-rays? Gamma rays? Why do astronomers need to consider the whole EM spectrum? What advantage do satellite telescopes have over earth bound telescopes?
13-3 Using Electromagnetic Waves	page 389
carrier wave Global Positioning System (GPS) telecommunication amplitude modulation frequency modulation	What parts of the EM spectrum are used for communication? How? How do radio and TV stations transmit information? What is one way an EM wave is used in telephone communication? What might GPS be used? List three.

*Science and History: Hopping the Frequencies page 396-397