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\nCommon Core Algebra 1, Unit 7: Exponential Functions\n

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\n\nFor Teachers\n\n9th - 10th\n\nStandards\n
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\nThe three lessons in the Exponential Functions Unit cover exponential growth, exponential decay, and linear vs. exponential. In the first lesson, learners watch a quick review on function notation as they prepare to learn more about...\n
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Instructional Video8:06
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\n\"Finding\n\n
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\nKrista King Math\n
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\nFinding Half Life\n

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\n\nFor Students\n\n11th - Higher Ed\n
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\nWhen will half of the substance be gone? Using the exponential decay formula, the video finds the half-life of radium-226. The 29th installment in a 31-part series goes on to discuss that the calculations are the same independent of the...\n
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Instructional Video13:53
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\n\"Half\n\n
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\nEducreations\n
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\nHalf Life Problems\n

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\n\nFor Students\n\n9th - 12th\n
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\nDoes a radioactive cat have 18 half-lives? An understanding of half-life is important in both chemistry and biology, so start your young scientists off the right way — with the good foundation provided by a video that begins with a graph...\n
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\nGet a Half Life!: Student Worksheet\n

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\n\nFor Students\n\n6th - 8th\n
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\nUpper elementary or middle schoolers will explore non-linear functions, graphing, and the curve of best fit through real-life data collection and trial analysis. They explore the concept of half-life and radioactive decay using M&Ms,...\n
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Instructional Video1:42
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\n\"Half-Life\n\n
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\nDoodleScience\n
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\nHalf-Life\n

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\n\nFor Students\n\n9th - 12th\n
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\nWhat is half-life and how can decay be used to date items? Viewers find out in this video that details half-life and radioactive decay, as well as the difference between alpha and beta decay.\n
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\n\"Half-Life\n\n
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\nKenan Fellows\n
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\nHalf-Life\n

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\n\nFor Teachers\n\n9th - 12th\n\nStandards\n
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\nScholars shake their way to understanding half-life with the help of candy. They observe and record which side candy lands on to graph the exponential decay in the fifth lesson of seven integrating chemistry and algebra. Combining...\n
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\nGet a Half-Life Student Worksheet\n

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\n\nFor Students\n\n6th - 8th\n
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\nYoung scientists use a worksheet to help them perform a lab on the decay of a radioactive element. The worksheet serves as both a task guide and a lab sheet for pairs of learners. This activity requires a calculator and has excellent...\n
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\n\"Radioactive\n\n
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\nVirginia Department of Education \n
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\nRadioactive Decay and Half-Life\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nExplain the importance of radioactive half-life as your high school biologists demonstrate the concept by performing a series of steps designed to simulate radioactive decay. Pupils use pennies to perform an experiment and gather data....\n
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Instructional Video3:05
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\n\"How\n\n
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\nAmerican Chemical Society\n
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\nHow Do We Know the Half Life of Uranium and Can You Collect Gold Once It's Dissolved in Acid?\n

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\n\nFor Students\n\n9th - Higher Ed\n\nStandards\n
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\nParticipate in a little chemistry Q and A! Part of a larger series on reactions, an informative lesson takes questions from viewers and crafts responses. The video explains how we arrive at an accurate half-life of a radioactive...\n
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\nCurated OER\n
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\nTeaching Radioactive Decay: Radioactive Half-life And Dating Techniques\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nHigh schoolers generate a radioactive decay table for an imaginary element using a box filled with pinto beans and M&M's. They use their data to plot a decay graph, develop the concept of half-life, and use the graph to \"age\" several...\n
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Activity
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\n\"Radioactive\n\n
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\nExploratorium\n
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\nRadioactive Decay Model\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nToss 100 pennies (or poker chips or any other two-different-sided objects) and remove all of those displaying tails. Line them up and repeat. The lines of pennies collected get smaller each time, successfully representing half-life.\n
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\n\"Half-life\n\n
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\nHalf-life Worksheet\n

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\n\nFor Students\n\n11th - 12th\n
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\nIn this half-life worksheet, students determine how long it takes for a 100g sample of AU-198 to decay to 6.25g. Then they determine the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours. Students also...\n
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\nGet a Half-life!\n

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\n\nFor Teachers\n\n9th - 12th\n
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\nStudents explore decay functions and the half-life of a substance. Through an M&M activity with calculators, students collect and graph data. They determine the linear, quadratic and exponential functions of the graph. Students...\n
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\n\"Half\n\n
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\nHalf Life Lab\n

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\n\nFor Teachers\n\n7th\n
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\nSeventh graders model radioactive decay using pennies, collect data from their model, apply scientific visualization techniques to their data and create animated models explaining the concept of radioactive half-life.\n
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Worksheet
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\n\"Half-Life\n\n
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\nHalf-Life\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this half-life worksheet, students are guided through the steps of solving radioactive decay problems. They solve nine problems finding rates of decay, half-life and quantities of substances remaining after given amounts of time.\n
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\nWorking with Half-Life\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this half-life worksheet, learners use a given table of half lives, mass, time and amount of original sample to solve for unknowns in nine given half-life problems.\n
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\nMath in Science-Radioactive Decay and Half-Life\n

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\n\nFor Students\n\n9th - 11th\n
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\nIn this radioactive decay and half-life worksheet, students use given half-lifes to calculate the amount of time it will take for certain amounts of elements to decay. They also find the age of samples and determine how many grams of...\n
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\nDemonstrating the Half-Life of a Radioactive Isotope\n

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\n\nFor Students\n\n8th - 10th\n
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\nFor this half-life worksheet, students use 100 pennies to simulate radioactive isotopes and half-life. They place the pennies in a box and shake the box. All pennies that turn up tails are removed from the box. They represent the...\n
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\n\"Calculating\n\n
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\nCalculating Half-Life Problems\n

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\n\nFor Students\n\n8th - 10th\n
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\nIn this half-life worksheet, students are given a particular mass of an isotope of cesium and its half life. They are to determine how much cesium will remain after 90 years. They are guided through the problem solving process.\n
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\n\"Half-Life\n\n
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\nHalf-Life Problems\n

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\n\nFor Students\n\n9th - 12th\n
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\nIn this half-life worksheet, students calculate the half-life of isotopes, they find masses of isotopes remaining after specified times, and they find particular amounts of time needed to pass for given masses of isotopes to decay.\n
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Assessment
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\n\"Carbon\n\n
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\nIllustrative Mathematics\n
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\nCarbon 14 Dating in Practice I\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nHow old is the plant? Here is a task that presents the exponential decay function for carbon 14 in a plant. Pupils use the function to estimate the amount of carbon 14 in the plant when it died and analyze the function to find what...\n
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\n\"Nuclear\n\n
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\nNuclear Popcorn\n

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\nMake your lesson on radioactive decay pop with this lab exercise. Using popcorn kernels spread over a tabletop, participants pick up all of those that point toward the back of the room, that is, those that represent decayed atoms. As the...\n
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Interactive
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\n\"Alpha\n\n
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\nAlpha Decay\n

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\nThere are different types of radioactive decay, and alpha decay is when there are too many protons in a nucleus. Here is a simulation that shows alpha particles being emitted from a polonium nucleus. Learners see how radioactive decay...\n
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Instructional Video8:51
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\n\"Radiation\n\n
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\nRadiation and Radioactivity\n

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\n\nFor Students\n\n9th - 12th\n\nStandards\n
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\nExplore the science of radioactivity! A very thorough video lesson begins with an explanation of the chemical structure of radiation. It includes descriptions of benefits of radioactivity and half-life calculations.\n
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