Date: 10/15/2012 and 10/16/2012
Class: Physical Science
Periods: B2,3 and W1,3,4
Outcomes: Students will be able to describe what keeps nuclei together and be able to determine if a nucleus is unstable.
Standards: UCP.1-3,5; A.1,2; B.1,2; G.3
Student Needs:
Assessment Plan: Worksheet on nuclear stability, ticket to leave: name the force that keeps nuclei together and the force that causes them to be unstable.
Lesson Outline: Ask students what the 6 steps of the Scientific Method Are, to explain Boyle’s Law, and to determine the number of protons, neutrons and outer-shell electrons in Bromine-80 > Ask students what they know about radioactivity > Give directions: read Ch. 18 Sec 1 and jot down anything you think is important > Have students compare notes with their partner > Have them compare their notes with the notes posted online on schoology under files and add anything they’re missing > Talk about the ratio of protons to neutrons that are stable in small nuclei (1:1) and large nuclei (2:3) > Have students do the Nucleus Stability worksheet on schoology under assignments > If there is time remaining have students compare answers before submitting
Review: What are the 6 steps of the scientific method, explain Boyle’s Law, determine the number of protons, neutrons and outer-shell electrons in Bromine-80
Anticipatory Set/Opening: What is radioactivity?
Key Points: Strong force between protons and neutrons in a nucleus keep it together, electric repulsion between protons make nuclei unstable, small nuclei stable with a proton:neutron ratio of 1:1, large nuclei 2:3
Teaching Input: Ask review and prior knowledge questions, give directions for reading assignment and then comparing notes, give directions for worksheet.
Modeling: Demonstrate comparing notes and show them where the notes and assignment are on schoology
Checking for Understanding: Ask students what ratio of protons to neutrons is stable in small and large nuclei.
Guided Practice/Monitoring: Note-taking
Closure: Ticket to Leave: on a notecard name the force that keeps a nucleus together and the force that makes them unstable
Independent Practice: Worksheet
Reflection:
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