# A Room With A View Electromagnetic Spectrum - Weebly

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A Room With A ViewElectromagnetic SpectrumActivity 2 of 3Grade Level: 5 – 8Subject: SciencePrep time: 10 minutesActivity Duration: One class period (55 minutes)Materials category: General ClassroomNational Education aphy3c, 6aObjective: Be introduced to the Electromagnetic Spectrum and realize thatthere is energy beyond visible light that we cannot see.They will also identify examples of parts of the EM Spectrum.Materials: PrismStrong flashlightCrayons or markers Computer with Web Access (optional)Related Links:NASA Site Used for derivation of Lesson PlanElectromagnetic magers Education Site at Goddard Space Flight Centerhttp://imagers.gsfc.nasa.gov/Supporting NASAexplores Article(s):A Room With A Viewhttp://www.nasaexplores.com/share2 articlea.php?id 01-004

What are waves?Have you ever ridden a wave in the ocean?Ocean waves travel on the surface of the water. Youcan see them and you can feel them. As you swimthrough the water, you can even make your ownwaves.Have you ever seen a flag on a windy day?The wind creates waves in the flag. Both the waves in the flag and the ocean waves arewaves that you can see. There are other kinds of waves. We cannot see these waves, butwe experience them every day. These waves are called electromagnetic waves.What are electromagnetic waves?Electricity can be static, like what holds aballoon to the wall or makes your hair standon end. Magnetism can also be static like arefrigerator magnet. But when they changeor move together, they make waves electromagnetic waves.Electromagnetic waves are formed when anelectric field couples with a magnetic field.Magnetic and electric fields of anelectromagnetic wave are perpendicular toeach other and to the direction of the wave.James Clerk Maxwell and Heinrich Hertzare two scientists who studied howelectromagnetic waves are formed and howfast they travel.Sound also travels in waves, though we can't see them. Like ocean waves, sound wavesneed a medium to travel through. Sound travels through air - and can even travel throughwater! There is no sound in space because there is nothing there to transmit the soundwaves. This is why astronauts on spacewalks use radios to communicate. Radio wavesare a type of electromagnetic wave.Electromagnetic waves do not need anything to travel through. They can travel throughempty space. They can also travel through air and even through solid materials.

Electromagnetic Waves have different wavelengths.When you listen to the radio, watch TV, orcook dinner in a microwave oven, you areusing electromagnetic waves.Radio waves, television waves, andmicrowaves are all types ofelectromagnetic waves. They only differfrom each other in wavelength.Wavelength is the distance between onewave crest to the next.Waves in the electromagnetic spectrum vary in size from very long radio waves the sizeof buildings, to very short gamma rays smaller than the size of the nucleus of an atom.Did you know that electromagnetic waves can not only be described by their wavelength,but also by their energy and frequency? All three of these things are related to each othermathematically. This means that it is correct to talk about the energy of an X-ray or thewavelength of a microwave or the frequency of a radio wave.

A Room With A ViewElectromagnetic SpectrumStudent SheetsDirections: Use the descriptions below to help locate examples of electromagneticwaves in the Wavestown picture.Radio waves have the longest wavelength in the electromagnetic spectrum. These wavescarry the news, ball games, and music you listen to on the radio. They also carry signalsto television sets and cellular phones.Microwaves have shorter wavelengths than radio waves, which heat the food we eat.They are also used for radar images, like the Doppler radar used in weather forecasts.There are infrared waves with long wavelengths and short wavelengths. Infrared waveswith long wavelengths are different from infrared waves with short wavelengths.Infrared waves with long wavelengths can be detected as heat. Your radiator or heatergives off these long infrared waves. We call these thermal infrared or far infrared waves.The sun gives off infrared waves with shorter wavelengths. Plants reflect these waves,also known as near infrared waves.Visible light waves are the only electromagnetic waves we can see. We see these wavesas the colors of the rainbow. Each color has a different wavelength. Red has the longestwavelength and violet has the shortest wavelength. These waves combine to make whitelight.Ultraviolet waves have wavelengths shorter than visible light waves. These waves areinvisible to the human eye, but some insects can see them. Of the sun’s light, theultraviolet waves are responsible for causing our sunburns.X-Rays: As wavelengths get smaller, the waves have more energy. X-Rays have smallerwavelengths and therefore more energy than the ultraviolet waves. X-Rays are sopowerful that they pass easily through the skin allowing doctors to look at our bones.Gamma Rays have the smallest wavelength and the most energy of the waves in theelectromagnetic spectrum. These waves are generated by radioactive atoms and innuclear explosions. Gamma rays can kill living cells, but doctors can use gamma rays tokill diseased cells.

µm4.0.3µm30nm5.3nm6.0.3nm0.03nm 0.003nm7.Label the chart below, thenmatch the items in the pictureto the Electromagnetic Spectrum.NameDateWavestown

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