Name ______Period _____ Waves Chapter 3 Study Guide
o Electromagnetic wave-______
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o What is a field? ______
o What are the two types of fields that make up an EM wave?
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o What is the source of most EM waves in Earth's environment?______
o Radiation ______
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o Because they ______need a ______, EM waves can pass through ______, which is a ______. Also, because they do not ______energy in ______, EM waves can cross the great ______that separate _____ and ______. In a ______, EM waves spread ______in _____ directions from the source of the disturbance. The waves then travel in a ______line until something ______with them. The ______the waves move from their source, the _____ they ______. As they ______, there are _____ waves in a given area and _____ energy is transferred.
o How are EM waves used to measure distances in space? ______
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o How fast do EM waves travel in a vacuum? ______
o What happens when EM waves encounter a material medium? ______
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o In what form do EM waves transfer energy in a vacuum? ______
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o How does microwave cooking depend on reflection? ______
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o ______-frequency EM waves, with ____ electromagnetic vibrations per second, have _____ energy. _____-frequency EM waves, with ______wavelengths, have _____ energy.
o Electromagnetic spectrum-______
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o Why is wavelength all you need to know to calculate EM wave frequency in a vacuum?
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o Radio waves-______
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o Radio was the _____ technology to use EM waves for ______which is ______over _____ distances. A _____ transmitter coverts _____ waves into _____ waves and ______them through the air in ______directions. Radio receivers in _____ locations _____ up the radio waves and ______them back into sound waves. ______radio stations broadcast radio waves at ______frequencies.
o What two properties of EM waves are used to attach information to radio signals?
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o Microwaves-______
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o A cell phone is ______a radio ______and receiver that uses ______. Cell phones depend on an ______network of cells, or areas of land several ______in diameter. Each _____ has at its ______a tower that sends and receives ______signals. The _____ connects cell phones ______the cell to each other or to the ______wire-based telephone system.
o Visible light-______
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o Infrared light-______
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o How do human beings perceive infrared radiation? ______
o Ultraviolet light-______
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o How is ultraviolet light used by animals? ______
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o X-rays-______
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o Gamma rays-______
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o Why can gamma rays not be used to image bones and teeth? ______
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What would the film look like if gamma rays were used? ______
o How is plant's use of light important to animals? ______
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o Incandescence-______
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o Why do little light reach Earth from stars other than the Sun? ______
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o Luminescence-______
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o Bioluminescence-______
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o How is bioluminescence different from incandescence? ______
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o What causes ordinary light bulbs to burn out? ______
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o Fluorescence-______
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o What causes fluorescence? ______
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o Why are fluorescent lights more efficient than incandescent lights? ______
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o What are some other types of artificial lights? ______
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o Transmission-______
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o Absorption-______
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o What is the difference between translucent and opaque material? ______
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o Why do some materials appear opaque? ______
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o Scattering-______
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o How does scattering make the sky blue? ______
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o Polarization-______
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o Prism-______
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o The _____ of an object or material is ______by the ______is absorbs and those it ______. An object has the _____ of the ______it ______. A material that ______all ______of ______light appears _____. A material that ______all ______of ______light appears _____. The color that an ______appear to the eye ______on another ______besides the ______the object ______and ______. An object can ______only ______that are in the _____ that ______on it. In _____ light, a _____ object ______all the ______of ______light and appears _____.
o Why does an object appear black? ______
o Primary colors-______
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o What does an equal mix of all three primary colors produce? ______
o Primary pigments-______
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o How is mixing pigments different from mixing light? ______
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You will have a vocabulary test on Tuesday December 6 and a test over chapter 3 on waves on Thursday December 8.
DecemThursday December 8.