LARN 024 C6D4
Start the following in class:
1. The accuracy and the precision of a given measurement are two different concepts. The required journal focus question for today, J24, is:
How are the accuracy and precision of a measurement different?
[Hint: Make sure you understand the distinctions between accuracy and precision by rereading text pages 64 and 65, doing problem #13 on page 72, and then checking your result with your teacher in class.]
2. Go to https://socratic.org/chemistry to research the topics brought up in section 3.1 of your text, OR use the PQ5R or SQ5R method to prepare a study guide for section 3.1 of your chemistry text on Measurements and Their Uncertainty. Read section 3.1 in your chemistry text, pages 62 through 72, and as you do, create a study guide using the SQ5R or PQ5R method explained in class. Or, if it will save you time, write a question for the section, read the section for the main idea and write a summary paragraph when you are done reading. You may record vocabulary entries in the body of your study guide, or you may check them off on the chapter 3 vocabulary list as you think about the meanings of the terms and add any notations to the vocabulary list for clarifications sake.
3. Record the following formula for use in all percent error problems for the rest of the year:
percent error = (observed value – accepted value) x 100
| accepted value|
Note that the above formula is different than that given in your text (PH p.65) and that percent error using this formula is a signed number indicating whether the error is higher or lower than the accepted value.
Recommended for those who have time left in their 45 minute study period, but not required of all:
1. Do some formative assessment problems to inform you as to your comprehension. Assessment questions printed at the end of the section that you have just read. Reflect on your answers. Make sure that you have understood the major points in the section that you have just read
- In your Learning Log use blue or black ink and place your hand in number in a circle followed by your name in the upper right white space of a piece of three holed composition paper that hasn’t been written on.
- Place the page reference for the problems to be considered to the left of the red marginal line on the first blue line. Centered on the first blue line,write a descriptive title for the learning activity such as Section [chapter #.section#] Responses.
- Before you write your response to a question or problem listed below, write its designation to the left of the red marginal line as listed below, followed by your response in ink to the right of the marginal line.
- In the Section Assessment 3.1 on page 72, read, analyze, and show your work for practice problem I3-13.
- Find those problems listed below, record your responses only for the questions that are challenging for you to answer, so that you can later review what you are learning. If all problems seem easy to you, record the response to the one that was least easy for you in your opinion.
- Study Conceptual Problem 3.1 on page 68 and then show your work for practice problems I3-1 (In chapter 3, problem 1) and I3-2.
- Study Sample Problem 3.1 on page 69 and then show your work for practice problem I3-3.
- Study Sample Problem 3.2 on page 70 and then show your work for practice problem I3-5.
- Study Sample Problem 3.3 on page 71 and then show your work for practice problem I3-7.
- Selected suggested responses to some of the formative assessment questions are found in Appendix E [pages R82 through R106 at the back of the text]. After you are finished, check page R83 of the text and check each of those problems that you can by writing in either a check mark (√) or a correction in green ink as we do in class.
- Some questions do not have a suggested response given. For each such question, circle the number of the question in the margin of your notebook paper and check your response with that of your classmates when you come to class.
2. Do the Home Inquiry Activity entitled Accuracy and Precision that is described on page 72 of your text. Before you start you should gather up all the materials needed for the activity that are listed on page 72 under the heading of Materials. After you have finished the activity, in your Laboratory notebook, record your responses to the four questions asked on page 72 about the activity that you performed.