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Name:______________________________ Class:_____ Date:_____/_____/_____ The Electromagnetic Spectrum An electromagnetic wave consists of what two types of changing fields? 1. ______________________________________________________________ 2. ______________________________________________________________ What do electromagnetic waves carry (like all waves)? ___________________ What medium do electromagnetic waves travel through? Explain. _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________ The origin of all electromagnetic waves is a ____________________________. Which travels more quickly: light or sound? _____________ What is evidence of this?______________________________________________________ _____________________________________________________________________ Which travels more quickly: visible light or microwaves? _____________ How fast do all electromagnetic waves travel (in a vacuum)? ______________________ Approximately how long does it take light from the sun to reach the Earth? ______________ (The sun is around 150 million kilometers Earth!) Electromagnetic waves are arranged in order of __________________ and __________________ in what is known as the ____________________________. The electromagnetic spectrum consists of the Come up with a creative way to remember following types of waves (listed from longest the order of the spectrum: wavelength/lowest frequency to shortest wavelength/highest frequency): R_______________ M_______________ I________________ V_______________ U_______________ X_______________ G_______________ R_______________ M_______________ I________________ V_______________ U_______________ X_______________ G_______________ 1. In each of the following pairs, circle the form of radiation with the LONGER WAVELENGTH: a. red light or blue light b. microwaves or radio waves c. infrared radiation or red light d. gamma rays or UV radiation 2. In each of the following pairs, circle the form of radiation with the GREATER FREQUENCY: a. b. c. d. yellow light or green light x-rays or gamma rays UV radiation or violet light AM radio waves or FM radio waves 3. In each of the following pairs, circle the form of radiation with the LOWER ENERGY (energy is directly related to frequency): a. b. c. d. e. f. g. h. red light or blue light microwaves or radio waves infrared radiation or red light gamma rays or UV radiation yellow light or green light x-rays or gamma rays UV radiation or violet light AM radio waves or FM radio waves Match each description in Column A with the correct term in Column B. Write the letters of the correct answers in the spaces provided. Column A Column B _______ 1. usually given off during nuclear reactions a. microwaves _______ 2. sometimes used to kill bacteria b. gamma rays _______ 3. the only part of the electromagnetic spectrum that the human eye can see c. X-rays d. ultraviolet rays _______ organs 4. can be used to form images of bones and internal _______ 5. felt as heat f. the visible spectrum _______ 6. waves with the longest wavelength and lowest frequency g. infrared rays _______ 7. range of electromagnetic waves _______ 8. often used for wireless communications and microwave ovens e. radio waves h. electromagnetic spectrum Skill Challenge Skills: interpreting diagrams, inferring The diagram below shows a model of the electromagnetic spectrum. Use the diagram to answer the questions. 1. Name three types of electromagnetic waves that have wavelengths longer than that of visible light. ______________________________________________________________________________ 2. Which type of wave has the shortest wavelength? ______________________________________ 3. Which color in the visible spectrum has the shortest wavelength? __________________________ 4. Which color in the visible spectrum has the longest wavelength? _________________ _