Lesson One

Lesson Plan One Teacher: Angela Schneider Course: Physics Grade: 11-12 Topic: Nuclear Energy CLE(s): Describe how changes in the nucleus of an atom during a nuclear reaction (i.e., nuclear decay, fusion, fission) result in emission of radiation). Identify the role of nuclear energy as it serves as a source of energy for the Earth, stars, and human activity (e.g., source of electromagnetic radiation, thermal energy within mantle, nuclear power plants, fuel for stars). Objectives: The student will identify different types of radiation. The student will describe the half-life process and demonstrate how they are calculated. Materials needed: fill-in notes for each student, writing utensils Introduction: Ask students what they think of when they hear the word ‘radiation’. Write key points on the board. Radiation is all around us, yet we can’t see it, feel it, smell it, or taste it. It comes from the earth itself, space, and man-made sources. Content: Present content to the class, writing key points on the board. Students should follow along and complete the provided notes. Radiation is produced by unstable atoms. Unstable atoms eventually decay into stable atoms and the energy produced as the atom decays is radiation. Sample decay chain: Uranium-238 > Thorium-230 > Radium-226 > Radon-218 > Bismuth 214 > Lead-206 No one knows exactly how a radioactive element will decay, but there is a known pattern describing how long it will take a particular atom to lose half its radioactivity called the half-life. Formula used to calculate half-life: A_E=A_o×〖0.5〗^(t/t_□(1/2) ) A_E: the amount of the substance remaining A_o: the original amount of the substance t: elapsed time t_(1/2): half-life of the particular substance Example: If you originally had 157 grams of carbon-14 and the half-life of carbon-14 is 5730 years, how much would there be after 2000 years? Three different types of radiation: Alpha radiation: alpha particles: emitted from unstable isotopes +2 charge, slow, easily stopped (paper, skin), internal hazard (damages tissues and cells) Beta radiation: beta particles: high energy electrons, faster and lighter than alpha particles, can travel through skin, internal and external hazard, blocked by thin layers of metals and plastic Gamma radiation: gamma rays: high energy light – part of the electromagnetic spectrum, travels at the speed of light, internal and external hazard, blocked by thick materials like cement or steel Alpha, beta, and gamma radiation are classified as ionizing radiation, which is especially dangerous because it can change the chemical makeup of many living things. All exposure to radiation will have biological effects, but exposure to large amounts of radiation can cause genetic defects or cancer, causes ionization of atoms, which affect molecules, which may affect cells, which may affect tissues, which may affect the whole body. Conclusion: Tomorrow we will do two labs, focusing on radiation.

Lesson One: Notes

RADIATION NOTES I. ____________________ is produced by unstable atoms. A. Unstable atoms are ____________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ B. Unstable atoms undergo a ___________________ process. The energy that is produced is called radiation. 1. Decay chain: Uranium-238 > ____________________________ > ______________________________ > Radon-218 > ¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬____________________________ > ______________________________ 2. No one knows exactly how a particular atom will decay, but there is a known pattern describing _________________________________________________ ________________________________________________________________ called the ________________________________________________________ a. Formula used to calculate the amount of decay: A_E=A_o×〖0.5〗^(t/t_□(1/2) ) 1. A_E: __________________________________________ 2. A_o: __________________________________________ 3. t:____________________________________________ 4. t_(1/2): __________________________________________ b. If you originally had 157 grams of carbon-14 and the half-life of carbon-14 is 5730 years, how much would there be after 2000 years? II. Types of radiation A. Alpha radiation 1. Comprised of _____________________________, which have a charge of +2. 2. Slow, easily stopped by ___________________________________________, _________________________ hazard – can damage ______________________ _________________________________________________________________ B. Beta radiation 1. Comprised of _______________________________, which are ___________ _________________________________________________________________ and are ________________________________________ than alpha particles. 2. Can travel through _________________, making it an ___________________ and __________________________ hazard. 3. Can be blocked by _______________________________________________ C. Gamma radiation 1. Comprised of ______________________________, which are _____________ _____________________________________________________ . a. Part of the ________________________________________________. b. Travel at _________________________________________________, which is _____________________________. 2. Can be blocked by ________________________________________________ making it an _________________________ and __________________________ hazard. D. Alpha, beta, and gamma radiation are all forms of _____________________________ ________________, which is dangerous because ________________________________ ________________________________________________________________________ III. Exposure to radiation will have _________________________________________________ A. Large amounts of radiation can cause _______________________________________ ________________________________________________________________________ 1. Which are caused by the _________________ of atoms. 2. Creates a chain of events that can eventually affect the ___________________ Atoms > ________________ > ________________ > ________________ > Whole body

Lesson Two

Lesson Plan Two *Experiments from the U.S. Nuclear Regulatory Commission Teacher: Angela Schneider Course: Physics Grade: 11-12 Topic: Nuclear Energy CLE(s): Make qualitative and quantitative observations using the appropriate senses, tools and equipment to gather data (e.g., microscopes, thermometers, analog and digital meters, computers, spring scales, balances, metric rulers, graduated cylinders). Identify the role of nuclear energy as it serves as a source of energy for the Earth, stars, and human activity (e.g., source of electromagnetic radiation, thermal energy within mantle, nuclear power plants, fuel for stars). Objectives: The student will investigate the ‘footprints’ of radiation, using The Cloud Chamber experiment. The student will detect and measure radiation using a Geiger counter. Materials needed: ‘The Cloud Chamber’ and ‘Using a Geiger Counter’ experiment sheets (per student); small transparent container with transparent lid, flat black spray paint, blotter paper, pure ethyl alcohol, radioactive source, masking tape, dry ice, styrofoam square, flashlight, gloves or tongs to handle the dry ice (per lab group); Geiger counter, radioactive sources, shielding materials (per lab group) Phase 1: Introduction: Orient students to the problem. Pass out and go over experiment sheets. Phase 2: Organize students for study. Students will work in their pre-determined lab groups. Phase 3: Assist group investigations Walk around the classroom as students perform the experiments, helping when necessary. Phase 4: Analyze and evaluate the problem-solving process. Students will answer post-lab questions.

Lesson Two: The Cloud Chamber

The Cloud Chamber While radiation cannot be seen, the cloud chamber allows you to see the tracks it leaves in a dense gas. Materials small transparent container with transparent lid flat black spray paint blotter paper pure ethyl alcohol radioactive source masking tape dry ice styrofoam square flashlight gloves or tongs to handle the dry ice First, paint the bottom of the container with black paint and let it dry. Then cut the blotter paper into a strip about as wide as the height of the container. Cut two windows in the strip, as shown, and place it against the inside of the container. Directions: Pour enough ethyl alcohol into the cloud chamber to cover the bottom of the container. The blotter paper will absorb most of it. Place the radioactive source in the cloud chamber and seal the lid with tape. Place the cloud chamber on the dry ice to super-chill it. Wait about five minutes. Darken the room. Shine the flashlight through the windows of the chamber while looking through the lid. You should see "puffs" and "trails" coming from the source. These are the "footprints" of radiation as it travels through the alcohol vapor. The vapor condenses as the radiation passes through. This is much like the vapor trail left by high flying jets. Do you see radiation in the cloud chamber? ________ Other Ideas To Explore Try to identify these footprints: •Alpha: sharp tracks about 1 cm long •Beta: thin tracks 3 cm to 10 cm long •Gamma: faint, twisting and spiraling tracks Caution: Dry ice should be handled very carefully! It can burn unprotected skin.

Lesson Two: Using a Geiger Counter

Using a Geiger Counter How radioactive are different materials? Materials Geiger counter Radioactive sources such as: cloisonne jewelry commercially available source from a science supply house luminescent clock face Shielding materials such as: paper aluminum foil brick jar of water piece of wood glass pane sheet of lead Directions: 1.One at a time, test each item that is a source of radioactivity by placing the source 2 inches from the Geiger counter probe. Which item has the highest reading?___________ The lowest?__________________________ 2.Place the radioactive source that had the highest reading 2 inches from the Geiger counter probe. One at a time, test each of your shielding materials by placing them between the source and the counter. Do you think the density of the shield is important?______________________________ Why?_________________________________________

Lesson Two: Post Lab Questions

Post lab questions 1.What materials are best for shielding? 2.Gamma radiation, a powerful type of radiation emitted from some radioactive isotopes, has no weight. What other types of radiation particles have no weight? 3.Because you could not see the radiation, what kind of observation did you experience? 4.What is happening to the radioactive source? 5.What radiation "footprints" did you see? Describe them. 6.Why do we measure radiation exposure? 7.When you use a Geiger counter to survey a radioactive substance, why is it important to know what the background radiation level is? 8.Has anyone you know been helped or harmed by radiation?

Lesson Three

Lesson Plan Three http://www.paec.org/progressenergygrant/lesson_plans.html Title: Nuclear Energy Transformed Grades: 9-12 Subject Area(s): Science and Reading Purpose of the Lesson: To increase students’ knowledge of nuclear fission and fusion; how they are alike, how they differ and how they may be used in generating electricity Essential Question(s): What are nuclear fission and fusion? How are they alike and how are they different? How is the fission process used in a nuclear reactor? Objectives: Upon the completion of the discussion, activities, and reading assignments, students will: 1. Define nuclear energy, nuclear fission, nuclear fusion and nuclear chain reaction. 2. Describe the process of nuclear fission and nuclear fusion and evaluate how the processes are alike and how they are different. 3 Explain how nuclear reactors are used to produce electrical energy. 4. Develop a timeline for the advancement of nuclear energy. Materials: Graphic Organizers: KWL, Venn diagram These may be accessed at: http://www.eduplace.com/graphicorganizer/ Computer and internet access for word processing, PowerPoint application, and accessing resource materials Visuals: Fusion reaction, fission reaction, nuclear reactor Writing Journals/notebooks, Reflection sheets Articles: “Nuclear Fission” and “Nuclear Fusion” which may be accessed at: http://www.howstuffworks.com/nuclear-power1.htm http://science.howstuffworks.com/fusion-reactor1.htm Websites: Nuclear Power Plant Demonstration http://www.ida.liu.se/~her/npp/demo.html How Nuclear Power Works http://www.howstuffworks.com/nuclear-power2.htm Nuclear Fission http://www.howstuffworks.com/nuclear-power1.htm Nuclear Fusion Animation http://web.jjay.cuny.edu/~acarpi/NSC-2/NuclearFusion.html Lesson Procedures: 1. Introduce the lesson - Using a KWL chart, ask for student responses for “What I Know” about Nuclear Fission and Fusion. 2. Group students into cooperative groups to share their responses to “What I Know.” Complete another KWL to capture each group’s knowledge. Each group will share any responses, not already listed on the board. NOTE: Any student misconceptions may be noted as “What I Need to Know.” 3. Give students a copy of the “Fission - Fusion Anticipation Guide” to complete, based upon the groups’ responses on the KWL. The guide is composed of selected questions from the articles, to be completed as a before-reading activity. Students will record responses on the left-hand side of the anticipation guide. 4. Provide articles and instruct students to complete the right side of the anticipation guide as they read the article. This is a during-reading activity. 5. After students have read the article, ask students to read selected questions from the anticipation guide, determine whether the statement is true or false, and discuss the rationale for their response. 6. REVIEW Nuclear Fission using the information available at the following Web site: http://www.howstuffworks.com/nuclear-power1.htm 7. REVIEW Nuclear Fusion using the information available at the following Web site: http://web.jjay.cuny.edu/~acarpi/NSC-2/NuclearFusion.html 8. As a formative assessment, ask students to complete a Venn diagram, comparing and contrasting nuclear fission and nuclear fusion. 9. Allow students to use computers to interact with an animated nuclear energy reactor to gain understanding of reactor structure and the working process. If students do not have classroom access to computers, the teacher may use the Websites listed below with a computer and LCD projector. The nuclear power plant demonstration and a graphic of the design may be accessed at the following URL addresses: http://www.howstuffworks.com/nuclear-power2.htm http://www.nrc.gov/reading-rm/basic-ref/students/reactors.html 10. Ask students to write a summary of their observations and develop questions relating to the animation and information. 11. Share the questions with classmates and discuss to ensure understanding. 12. Ask students to use texts and other resources to develop a time line for the advancement of nuclear energy. Assessments: Venn diagram, Lesson reflections/summaries, and time line Modification(s): The following modifications may be made to accommodate ESE and LEP students: • Graphic organizers- Pair students prior to instruction for brainstorming about main idea and vocabulary • Cooperative grouping- Grouping may provide additional peer assistance with vocabulary, as will having students write a sentence or draw a picture for each word. Remedial strategies include journaling and writing reflections/summaries of activities • Visual Interpretations- Use pictures, animations, diagram and graphs. • Spanish-English dictionaries and materials - There are also Websites where terms may be translated • Accommodations as listed on IEPs