CK-12 Foundation
Ck 12: Nuclear Radiation
[Free Registration/Login may be required to access all resource tools.] In this module, students will understand how radioactivity involves a change in the nucleus of a radioisotope and calculate the conversion of mass to energy...
TED Talks
Ted: Ted Ed: Radioactivity: Expect the Unexpected
Video explaining the process, risks, and benefits of radioactivity. [4:16] Followed by a short quiz and a list of additional resources to explore.
Science Struck
Science Struck: List of Radioactive Elements
Learn about radioactivity, the different types of radioactive decay, isotopes, and half-life of a radioactive element. Includes a long chart listing radioactive elements, atomic number and mass number, decay type, and length of half-life.
Concord Consortium
Concord Consortium: Exponential Decay
Learn about exponential decay in real-world situations. Problems involve the application of depreciation of an asset and radioactive decay. Learn to apply exponential decay equations and interpret graphs.
CK-12 Foundation
Ck 12: Physical Science: Radioactive Half Life
[Free Registration/Login may be required to access all resource tools.] The half-life of a radioisotope, rates of radioactive decay and variation in half-lives in different radioisotopes.
Khan Academy
Khan Academy: Mcat: Physical Processes: Atomic Nucleus: Decay Graphs and Half Lives Article
Explains how scientists can tell when radiation has been leaked, how to read a decay graph, what we mean by a half-life, and what carbon dating is.
Cool Math
Coolmath: Radioactive Decay 3
This Algebra Cruncher generates an endless number of practice problems for radioactive decay -- with hints and solutions!
BBC
Bbc: Gcse Bitesize: Radioactive Emissions
This lesson focuses on radioactive emissions including radioactive decay, half-life, using half-life, how to calculate net decline, a table showing how the count rate of an isotope might change over time, and a link to a test.
University of Michigan
University of Michigan: Radioactivity in Nature
An interesting essay about the prevalence of radioactivity in nature, with chart showing where it is found and information about half lives.
CK-12 Foundation
Ck 12: Nuclear Radiation
[Free Registration/Login may be required to access all resource tools.] Students investigate the characteristics of radioactive emissions, and then complete equations involving radioactive decay when given pertinent information.
Science and Mathematics Initiative for Learning Enhancement (SMILE)
Smile: Radioactive Decay:half Life
An experiment that will help students in determining the half-life of a radioactive element.
CK-12 Foundation
Ck 12: Half Life
[Free Registration/Login may be required to access all resource tools.] In this module, students will explore the radioactive decay process in terms of balanced nuclear equations to discover the concept of half-life.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Radioactive Dating Game
Learn about different types of radiometric dating, such as carbon dating. Understand how decay and half life work to enable radiometric dating. Play a game that tests your ability to match the percentage of the dating element that...
Other
Physics World: Radioactive Decay Accounts for Half of Earth's Heat
Find out about the source of heat from the Earth's core. (Published 19 July 2011)
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Geologic Age
Explore geologic time of the Earth and learn how radioactive decay helps to establish a timeline.
Exploratorium
Exploratorium: Radioactive Decay Model
Substitute coins for radiation. A coin experiment using radioactive decay.
Soft Schools
Soft Schools: Radioactivity Quiz
Take an interactive quiz over radioactivity. After completing the quiz, check your score, and then revisit any incorrect question for further review.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Alpha Decay
Via this interactive SIMS experiment, students will grasp better understanding of decay in alpha particles and their relationship to half life. Lessons and teacher tips included.
CK-12 Foundation
Ck 12: Physical Science: Beta Decay
[Free Registration/Login may be required to access all resource tools.] How and why beta decay occurs, its dangers, beta-minus and beta-plus decay and how to write a balanced nuclear equation for beta decay.
CK-12 Foundation
Ck 12: Physical Science: Alpha Decay
[Free Registration/Login may be required to access all resource tools.] How and why alpha decay occurs, its dangers and how to write a balanced nuclear equation for alpha decay.
Science Education Resource Center at Carleton College
Serc: Radioactive Dating: Looking at Half Lives Using M&ms
In this activity, students gain a better understanding of radioactive dating and half-lives by using M&Ms to demonstrate the idea of radioactive decay. They will be able to see how scientists can determine the age of rocks by looking...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Exponential Decay
Find a quick, concise explanation of exponential decay in several different settings. An example is given and clearly explained for each of those settings.
CK-12 Foundation
Ck 12: Physical Science: Gamma Decay
[Free Registration/Login may be required to access all resource tools.] Explains how and why gamma decay occurs, what gamma rays are, and why gamma radiation is the most harmful.
Story Behind the Science
Story Behind the Science: Just How Old Is Earth? [Pdf]
Article describing efforts in the 19th and 20th centuries to determine the Earth's age, particularly using naturally occurring radioactivity. It notes that scientific disciplines frequently overlap in the work they do. Questions are...