Chemistry
Standard 2, Objective 2
Title: Picture Guide for Radioactivity
Description: Quantum Learning states that “there is no understanding without pictures.” This is a study guide where the students draw pictures and write descriptions to review their chapter on radioactivity.
Time Needed: Teachers may choose to give students as much time as they would like to take in class and make the rest of the picture guide homework.
Prior Knowledge: This guide should be given at the end of the chapter on half-lives and radioactivity. Problems can be deleted or inserted depending on what was covered during the chapter. The packet corresponds to the Utah State Core Standards.
Safety Considerations: None.
Procedure:
1. Pass out the Picture Guide for the radiation unit. Students must color in their pictures (it’s been shown that the brain will differentiate better when different colors are used) so it might be helpful to put colored pencils and markers for the kids to use. If funny stories or pictures were used to teach some of the topics, they can be used in the student drawings.
2. Show an example from a student from a past year (if this is the first time using this lesson, you can use the student example in this lesson) so students know what is expected of them.
3. Explain a head of time to the students how this assignment will be graded. This should be due the day before the exam so any misconceptions can be cleared up during the review of this picture guide.
Scoring Guide: Give the students 2 points per picture and for each explanation (each problem should have at least one picture and one explanation). This picture guide is worth about 60 points. Each can be graded in seconds so it’s nice to have the teacher grade these at the beginning of class while the students work on something else for a minute. This way, the students can fix their own work and keep the guide to study for the exam. The students mostly just get participation points for completing the assignment.
Name_______________ Period______________
Picture Guide Chp. 4
Instructions: Draw a picture of each item, even if you give an explanation.
1. Know the difference between:
Alpha Beta Gamma
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2. There is a lot more energy that comes from nuclear reactions (deals with protons and neutrons) than chemical reactions (deals with electrons).
3. Know the difference between the two forces.
Attractive Repulsive
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4. The nucleus can become unstable if the nucleus is large. Too many neutrons can make the atom unstable because they will change into protons and electrons. Neutrons need to be near a proton to be stable.
5. Define half-life and understand what is happening in half-life graphs and decay (half-life) problems. Be able to interpret half-life graphs.
6. The shorter the half-life, the greater radioactivity an element has.
7. Know how scientists date organisms that were once living. Know the difference between C-12 and C-14.
8. Compare risks and benefits of nuclear power (fission).
9. Mass can be converted into big time energy.
10. Know the differences between:
Fission Fusion
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11. You are an archeologist and find that a certain radioactive element has a half-life of 1000 years. If you start with a 150 gram sample of the element, how much is left after 5000 years? How much has transmuted into another element? Show your work using a table as well making a graph with the data.