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9 Cards in this Set
- Front
- Back
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radiometric dating
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The use of radioisotopes to determine the age of rocks and fossils.
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radiocarbon dating
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Radiometric dating with the element carbon. All living things contain a small amount of radiocarbon, and carbon (along with radiocarbon) is always being replaced. When living things die, the decaying radiocarbon is no longer being replaced.
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how does radiocarbon work?
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since all fossils were once living, their age can be determined by measuring the amount of radiocarbon remaining. Although, after about 50,000 years the amount of radiocarbon becomes too small to measure accurately.
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nuclear reactors
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a machine that goes through the process of generating electricity.
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fuel rods
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when uranium is converted to uranium dioxide and then sealed into rods.
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fission
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the reaction that occurs when neutrons are fired at the radioactive uranium, causing uranium nuclei to split and form two new elements, releasing neutrons, radiation and heat in the process.
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nuclear waste
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some of the waste radioisotopes have half-lives of only minutes, while others have half-lives of thousands of years. These products are sealed in steel containers or glass blocks and stored in power station or buried deep at sea or underground.
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external radiotherapy
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when radiation is directed at the cancer by a machine.
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internal radiotherapy
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involves placing radioisotopes inside the body at or near the site of the cancer.
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