1. Radiation

2. Common Core Connection
Objectives Today I will be able to: Differentiate between the composition and materials required to shield alpha, beta and gamma emissions. Identify practical uses for alpha, beta and gamma emissions. Write balanced alpha and beta decay equations.
Informal assessment – monitoring student questions and interactions as they complete the radioactive particles chart and the decay equation practice
Formal assessment – analyzing student responses to the warm up, online polls and closure
Common Core Connection
Build Strong Content Knowledge
Use technology and digital media strategically and capably
Reason abstractly and quantitatively
Look for and make use of structure
Make sense of problem and persevere in solving them

3. Lesson Sequence Evaluate: Warm Up (5 min)
Engage/ Explore: Radiation Introduction Polls (5 min)
Informal assessment of student prior knowledge
Explain: Radioactive Particles Chart (10-15 min)
Elaborate: Radioactive Particles Chart Discussion (10 min)
Informal assessment of students questions and responses
Explain: Writing Decay Equations (10 min)
Elaborate: Decay Equation Practice (1o min)
Informal assessment of student questions and responses
Engage/Elaborate: Compute your Own Radiation Dose (Time Permitting –(5 min)
Evaluate: Closure (3 min)
Formal assessment of meeting the objectives

4. Warm Up What is radioactivity?
What is the difference between fission and fusion?
Is radioactivity an example of fission or fusion
Where is nuclear energy produced?

5. Objectives Today I will be able to:
Differentiate between the composition and materials required to shield alpha, beta and gamma emissions.
Identify practical uses for alpha, beta and gamma emissions.
Write balanced alpha and beta decay equations.

6. Homework Begin studying for your Unit 3 Exam on Tuesday, October 14
Topics:
Atomic Structure
History of the Atom
Radioactivity
Complete the alpha and beta decay practice problems worksheet

7. Agenda Warm Up Radioactive Particles Chart
Radioactive Particles Chart Discussion
Writing Decay Equations
Decay Equation Practice
Extension: Compute your Own Radiation Dose
Closure

8. There are 3 main types of radiation that produce energy
Alpha
Beta
Gamma
Today you will research the three types of radiation

9. Task: Complete the Radioactive Particles Chart
Use Chapter 4 p. 122 – 125 in the textbook to complete the chart
Use your electronic device to research how the radiation can be blocked and practical uses.

10. We will review the information filled in on the chart as a class.
Chart Discussion
Alpha Decay Animation -

11. Radiation
Symbol
Charge
Composition
Is shielded or stopped by?
Alpha
Beta
Gamma

12. Is shielded or stopped by?
Radiation
Symbol
Charge
Composition
Is shielded or stopped by?
Alpha
2+ Charge
2 p+ and 2 n0
Beta
-1 Charge
Stream of high speed e-
Gamma
No Charge
Very high energy electromagnetic radiation

13. Is shielded or stopped by?
Radiation
Composition
& Symbol
Is shielded or stopped by?
Alpha
2+ Charge
2 p+ and 2 n0
paper
Beta
-1 Charge
Stream of high speed e-
Clothing, wood
Gamma
No Charge
Very high energy electromagnetic radiation
Concrete, lead

14. Shielding Radiation , aluminum
Which type of radiation is the most penetrating? gamma rays
Which type of radiation do you think is most dangerous? gamma rays
Sun glasses have UVA and UVB protection.
The UV-A stand for ultra violet alpha particles and the UV-B stands for ultra violet beta particles.
Almost all sunglasses offer 100% UVA protection. Be sure to get 100% UVB protection as well.

15. We can represent the energy emitted during radioactive decay using a decay equation

16. What are the pieces of a radioactive decay equation?
Radioactive Particle Symbol
New Decay Product
Unstable Isotope

17. Alpha Decay Equation Example
The Calvert Cliff’s nuclear power plant uses Uranium – 235. Write the alpha decay equation

18. Beta Decay Equation Example
The radioisotope yttrium-90 is used in cancer treatments. Write the beta decay equation.

19. Gamma Radiation Example
Gamma radiation is emitted from Uranium 235 at the nuclear power plant. Write an equation representing the gamma energy emitted.

20. Task: Complete the Decay Equation Practice at your desk

21. Task: Complete the “Compute Your Own Radiation Dose” worksheet at your desk

22. Compute Your Own Radiation Analysis
What quantity of radiation are you exposed to per year?
What does this mean?
No evidence of cancer occurring <10,000 mrem exposure
Body has time to repair cells when exposed to low concentrations of radiation
Correlation has been found with cancer and radiation exposure >50,000 mrem

23. Exit Ticket What are 2 things you learned today?
What is one question you may still have about radiation?