Unit B Assessment
1. Unit B Assessment
Unit B Assessment
Unit Assessment
© N Joy Neish/shutterstock
In Unit B you learned about electrochemical change. The contents of an emergency kit are pictured. Choose one item from the kit. Using resources like the textbook, the Internet, and product information, determine how the operation of the chosen device involves an electrochemical change.
Use relevant chemical equations and terms to explain the electrochemical change that occurs and to explain how this electrochemical change contributes to the function of the device. State one positive or one negative aspect of the device's use that relate to the electrochemical change involved in its operation. You may wish to support your response with graphics or an audio recording.
Developing Your Response
The format for the Unit B Assessment and its response is intended to familiarize you with the expectations of other assessments you may encounter in this course, including unit tests administered by your teacher and the Chemistry 30 Diploma Examination. Pay careful attention to the question elements and to the descriptions of performance—these can improve your ability to address these kinds of questions and your test results.
When answering detailed questions like this one, it's important to review and understand the criteria that will be used to assess your response. Use the scoring guide provided and the Making Sense of Scoring Criteria chart to plan and develop your response.
It is important to review and understand the criteria in a scoring guide before you start to develop your response, since the scoring guide gives you all of the points you need to address in your answer. Consider the descriptive terms used in the scoring guide to make sure you properly develop ideas and use examples and other information to support your ideas. You should also use the criteria to when you proofread and revise your response before submitting your response to your teacher.
Save your completed response in your course folder, and submit a copy to your teacher.
Score |
Scoring Description |
5 |
The response demonstrates an excellent understanding of an electrochemical change occurring in one component of the emergency kit and uses a correct chemical equation and an accurate and thorough explanation of the electrochemical change involved. The explanation of the contribution of the electrochemical change to the overall function of the device is explicit and well thought-out. Statements of benefits and negative aspects are accurate and insightful. |
4 |
The response demonstrates a good understanding of an electrochemical change occurring in one component of the emergency kit and uses a correct chemical equation and an accurate explanation of the electrochemical change involved. The explanation of the contribution of the electrochemical change to the overall function of the device is correct and well thought-out. Statements of benefits and negative aspects are accurate and insightful. |
3 |
The response demonstrates a satisfactory understanding of an electrochemical change occurring in one component of the emergency kit and uses a correct chemical equation and a plausible explanation of the electrochemical change involved. The explanation of the contribution of the electrochemical change to the overall function of the device is generally correct. Statements of benefits and negative aspects are correct. |
2 |
The response demonstrates a poor understanding of an electrochemical change occurring in one component of the emergency kit and uses a plausible chemical equation. Accompanying explanations are sketchy and lack development. The explanation of the contribution of the electrochemical change to the overall function of the device is vague. Benefits and negative aspects are listed. |
1 |
The student provides a solution that contains a relevant statement that begins to answer the question. |
0 |
The response is incorrect and/or totally off topic. |