Physics Aviary
Physics Aviary: Practice Problems: Half Life From Graph
Determine the half-life of an isotope based on the graph of the amount of the isotope left as a function of time.
Physics Aviary
Physics Aviary: Practice Problems: Half Life From Data
Determine the half-life of an isotope based on the activity data of the isotope as a function of time.
Physics Aviary
Physics Aviary: Practice Problems: Decay Constant and Half Life From Table
Determine the decay constant and half-life of an isotope based on the activity data of the isotope as a function of time.
CK-12 Foundation
Ck 12: Radioactive Half Life
[Free Registration/Login may be required to access all resource tools.] Explains radioactive half-life and radioactive dating, and demonstrates how to solve problems with each.
Utah Education Network
Uen: Radioactive Review
This lesson consists of half-life problems for the students to work out.
Department of Defense
Do Dea: Ap Calculus: Radioactivity and Half Life [Pdf]
Apply the Law of Exponential Change to solve a "real-world" science problem. Formulas and examples are provided. Great review for the AP Calculus test!
Illustrative Mathematics
Illustrative Mathematics: F Bf 1,000 Is Half of 2,000
This task is about an online mathematics organization that is trying, over a four-year period, to generate 2,000 math problems that cover all grades. This real-life modeling task could serve as a summative exercise that draws on many...
Texas Instruments
Texas Instruments: Growth and Decay Formulas
In this question set, students use exponential growth and decay functions to solve problems about compound interest, population growth, investments, and half-life. Solutions and explanations are provided for these problems.
Purple Math
Purplemath: Logarithmic Word Problems
Logarithmic word problems generally involve evaluating a given logarithmic equation at a given point, and solving for a given variable; they're pretty straightforward. This resource contains worked examples to demonstrate the reasoning...
PBS
Idaho Ptv: Science Trek: Salmon
An excellent and comprehensive resource on salmon. Includes three videos: a half-hour show, a video short, and a short video where an expert answers children's questions. The facts section covers every topic you might think of, including...
Cool Math
Coolmath: Radioactive Decay 2
This Algebra Cruncher generates an endless number of practice problems for radioactive decay -- with hints and solutions! Find the half-life.
University of Saskatchewan (Canada)
University of Saskatchewan: Modeling Exponential Decay Using Logarithms
Radioactive decay is a real-life example of exponential decay. This site solves an example problem by using the exponential decay equation.