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Signing in now will connect your and Teachers' Domain accounts, so that in the future you will automatically be signed into Teachers' Domain when you come from . Everyday Radiation Resource for Grades 6-12 | Citation Media Type: Video Running Time: 1m 46s Size: 5.3 MB View or Download SAVE TO FOLDER Loading... Save Cancel Share | Source: FRONTLINE: "Nuclear Reaction" Resource Produced by: Collection Developed by: Collection Credits Collection Funded by: See Also: National K -12 Subject: The Atomic Basis of the Properties of Matter Atomic Nucleus Nuclei and Radiation Lesson Plans Using this Resource: Radiation: To Worry or Not to Worry Radiation is everywhere, but that doesn't mean any of us is in particular danger. In fact, some radiation, such as that in sunlight, is essential to life on Earth. This video segment, adapted from FRONTLINE, identifies some of the sources of radiation that we encounter each day and describes their relative health effects. Permitted use: Download and Share Accessibility Features: Caption Background Essay The term radiation strikes fear into the hearts of most people. Yet, all of us are constantly exposed to radiation, and for the most part we suffer few adverse effects. In fact, some forms of radiation are critical to life. Without light and heat from the Sun, both forms of electromagnetic radiation, Earth would be a dark, cold, and lifeless place. Radiation may be in the form of electromagnetic waves such as light and gamma rays, or particles such as neutrons, protons, and electrons. Regardless of its form, all radiation carries energy and affects matter by transferring its energy to the particles in matter. This causes the atoms and molecules of the affected material to vibrate or to undergo a change in their chemical arrangement or internal state or structure. The energy from radiation sometimes increases molecular movement slightly, causing a gentle warming or a change in state, such as from solid to liquid. An example of this type of change is the melting of snow in the sunlight. In other cases, radiation's energy is powerful enough to knock the electrons out of atoms or molecules, transforming them into negatively or positively charged ions. Radiation at such a high energy level is called ionizing radiation. Scientists call substances that spontaneously give off radiation in the form of waves or particles radioactive. Instability in the atomic nuclei of radioactive substances causes them to cast off rays or subatomic particles. This process, called radioactive decay, may result in a more stable form of the same element or in a different element altogether. Often, the new elements that result from radioactive decay are also unstable and undergo further decay. Print Background Essay Discussion Questions What sources of radiation are people exposed to in everyday life? Should people be concerned about the amount of radiation emitted by rocks, building materials, and cosmic rays? Explain your answer. Where do you think the radiation in your food comes from? How is radiation detected and measured? Print Discussion Questions Standards About Standards | Report a Standards Mismatch About Standards | Report a Standards Mismatch About Standards | Report a Standards Mismatch   close Report a standards correlation problem To help improve this service, please report and describe any standards correlations that you find to be inaccurate. close About standards correlation Academic standards correlations on Teachers' Domain use the Achievement Standards Network (ASN) database of state and national standards, provided to NSDL projects courtesy of JES & Co. 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