Date: 10/19/2012 and 10/22/2012
Class: Physical Science
Periods: B2,3 and W1,3,4
Outcomes: Students will be able to explain radioactive half-life.
Standards: UCP:1-3,5; A:1,2; B:1,2; F:1
Student Needs:
Assessment Plan: Students will explain complete a modeling exercise and use it to explain radioactive decay.
Lesson Outline: Ask students what Archimedes’ Principle is, what the Atomic number tells you and what the Mass number tell you > Discuss how radioactivity can be detected by ionization > Put students into groups of 4 for lab activity > Give directions for lab > Have a random student repeat directions for the lab > Monitor students progress > Ask students to discuss with their group what radioactive half-life is
Review: Ask students what Archimedes’ Principle is and what the Atomic Number and the Mass Number from the Periodic Table tell you
Anticipatory Set/Opening: Nuclear waste can take thousands and millions of years before it stops being dangerous to living things.
Key Points: Every half-life results in half the atoms of a radioactive substance being decayed.
Teaching Input: Give instructions for lab activity.
Modeling: Model a nuclear decay process for Nitrogen-15
Checking for Understanding: Have students repeat directions
Guided Practice/Monitoring: Lab exercise
Closure: Have students as a group come up with a definition of radioactive half-life.
Independent Practice: Read Ch. 18 Sec 4 focusing on the difference between nuclear fusion and fission.
Reflection:
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