FOR TEACHERS ONLY The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION
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1 PS C FOR TEACERS ONLY The University of the State of New York REGENTS IG SCOOL EXAMINATION PYSICAL SETTING/CEMISTRY Wednesday, January 28, :15 a.m. to 12:15 p.m., only SCORING KEY AND RATING GUIDE Directions to the Teacher: Refer to the directions on page 3 before rating student papers. Part A and Part B 1 Allow 1 credit for each correct response. Part A Part A Score Part Part B 1 B Part B 1 Score [1] [OVER]
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3 PYSICAL SETTING/CEMISTRY continued Directions to the Teacher Follow the procedures below for scoring student answer papers for the Physical Setting/Chemistry examination. Additional information about scoring is provided in the publication Information Booklet for Administering and Scoring Regents Examinations in the Sciences. Use only red ink or red pencil in rating Regents papers. Do not correct the student s work by making insertions or changes of any kind. On the detachable answer sheet for Part A and Part B 1, indicate by means of a checkmark each incorrect or omitted answer. In the box provided at the end of each part, record the number of questions the student answered correctly for that part. At least two science teachers must participate in the scoring of each student s responses to the Part B 2 and Part C open-ended questions. Each of these teachers should be responsible for scoring a selected number of the open-ended questions on each answer paper. No one teacher is to score all the open-ended questions on a student s answer paper. Students responses must be scored strictly according to the Scoring Key and Rating Guide. For open-ended questions, credit may be allowed for responses other than those given in the rating guide if the response is a scientifically accurate answer to the question and demonstrates adequate knowledge as indicated by the examples in the rating guide. Complete sentences are not required. Phrases, diagrams, and symbols may be used. In the student s answer booklet, record the number of credits earned for each answer in the box printed to the right of the answer lines or spaces for that question. Fractional credit is not allowed. Only whole-number credit may be given to a response. Units need not be given when the wording of the questions allows such omissions. Raters should enter the scores earned for Part A, Part B 1, Part B 2, and Part C on the appropriate lines in the box printed on the answer booklet and then should add these four scores and enter the total in the box labeled Total Written Test Score. Then, the student s raw score should be converted to a scaled score by using the conversion chart printed at the end of this Scoring Key and Rating Guide. The student s scaled score should be entered in the labeled box on the student s answer booklet. The scaled score is the student s final examination score. All student answer papers that receive a scaled score of 60 through 64 must be scored a second time. For the second scoring, a different committee of teachers may score the student s paper or the original committee may score the paper, except that no teacher may score the same open-ended questions that he/she scored in the first rating of the paper. The school principal is responsible for assuring that the student s final examination score is based on a fair, accurate, and reliable scoring of the student s answer paper. Because scaled scores corresponding to raw scores in the conversion chart may change from one examination to another, it is crucial that for each administration, the conversion chart provided in the scoring key for that administration be used to determine the student s final score. The chart in this scoring key is usable only for this administration of the examination. [3] [OVER]
4 PYSICAL SETTING/CEMISTRY continued Part B 2 Allow a total of 13 credits for this part. The student must answer all questions in this part. 51 [1] Allow 1 credit for C 5 12 (g) + 8 O 2 (g) 5 CO 2 (g) O(g). Allow credit even if the coefficient 1 is written in front of C 5 12 (g). 52 [2] a Allow 1 credit for a correct numerical setup. Acceptable responses include, but are not limited to, these 8 O O = O X 2 O 5 moles O 2 X moles = 2 O mol O 2 6 mol 2 O 8 mol O 2 or Allow 1 credit for a numerical setup consistent with the student s response to question 51. b Allow 1 credit for 3.75 or 3.8. or Allow 1 credit for a response consistent with the student s numerical setup for question 52a. 53 [1] Allow 1 credit for at least six correctly listed electronegativities as shown below. Atomic Number Electronegativity or [4]
5 PYSICAL SETTING/CEMISTRY continued 54 and 55 An example of an acceptable response is shown below. Electronegativity Atomic Number 54 [1] Allow 1 credit for a correctly scaled y-axis. 55 [1] Allow 1 credit for correctly plotting (±0.3 grid space) and connecting the points. Allow credit even if the points are not circled. 56 [1] Allow 1 credit for KCl or potassium chloride. 57 [1] Allow 1 credit for 90 (±2). 58 [1] Allow 1 credit for 30 (±2). or Allow 1 credit for a response consistent with the student s answer to question 57. [5] [OVER]
6 PYSICAL SETTING/CEMISTRY continued 59 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these half-cell 1 Pb left lead 60 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these from the Pb electrode to the Ag electrode left to right cell 1 cell 2 Note: Allow credit for right to left or for its equivalent only if it is consistent with the student s response to question 59. Do not allow credit for a response that indicates that electrons flow through the salt bridge. 61 [1] Allow 1 credit for Pb(s) Pb 2+ (aq) + 2e. Allow credit even if the labels (s) and (aq) are not included. 62 [1] Allow 1 credit for P or for any other acceptable arrangement of five dots around the element symbol P.. [6]
7 PYSICAL SETTING/CEMISTRY continued Part C Allow a total of 22 credits for this part. The student must answer all questions in this part. 63 [2] Allow 1 credit for A. and Allow 1 credit for D. 64 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these Energy is released when an electron falls from a high state (excited) to a low state (ground). excited state to ground state high energy to low energy 65 [1] Allow 1 credit for [1] Allow 1 credit for [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these A compound must contain two or more different elements. only 1 kind of atom present 68 [1] Allow 1 credit for esterification or making an ester. 69 [1] Allow 1 credit for alcohol. [7] [OVER]
8 PYSICAL SETTING/CEMISTRY continued 70 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these O C C C C C O C O C C C Note: Do not allow credit if the student has placed the O group on an end carbon. 71 [2] Allow 1 credit for indicating 4 2 e or 4 2α or α on the right side of the arrow. and Allow 1 credit for having mass/charge balanced. Acceptable responses include, but are not limited to, this example: Am 4 2e Np 72 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these 85 Kr undergoes beta decay and 241 Am undergoes alpha decay. Decay mode and half-life are different. half-lives different 73 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these Radioactivity can be used in medical diagnosis and/or treatment. food irradiation radioactive dating [8]
9 PYSICAL SETTING/CEMISTRY continued 74 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these Extensive exposure can make people sick. contamination of environment introduction of radioactive materials into the ecosystem 75 [1] Allow 1 credit for a correct response. Acceptable responses include, but are not limited to, these [2] a Allow 1 credit for a correct numerical setup. Acceptable responses include, but are not limited to, these 36 g 172 g = x or Allow 1 credit for a numerical setup consistent with the student s response to question 75. b Allow 1 credit for a correct response. Significant figures do not need to be used. Acceptable responses include, but are not limited to, these or Allow 1 credit for a response consistent with the student s setup. Significant figures do not need to be used. 77 [1] Allow 1 credit for D. 78 [1] Allow 1 credit for C. [9] [OVER]
10 PYSICAL SETTING/CEMISTRY concluded 79 [1] Allow 1 credit for KNO 3 or NaCl or N 4 Cl or N 4 NO 3, or potassium nitrate or sodium chloride or ammonium chloride or ammonium nitrate. 80 [1] Allow 1 credit for [1] Allow 1 credit for Ba(O) 2 or Sr(O) 2 or barium hydroxide or strontium hydroxide. Allow credit for just barium or strontium. [10]
11 Regents Examination in Physical Setting/Chemistry January 2004 Chart for Converting Total Test Raw Scores to Final Examination Scores (Scaled Scores) Raw Scaled Raw Scaled Raw Scaled Raw Scaled Score Score Score Score Score Score Score Score To determine the student s final examination score, find the student s total test raw score in the column labeled Raw Score and then locate the scaled score that corresponds to that raw score. The scaled score is the student s final examination score. Enter this score in the space labeled Final Score on the student s answer sheet. [11] [OVER]
12 Map to Core Curriculum January 2004 Physical Setting/ Chemistry Question Numbers Key Ideas Part A Part B Part C Standard 1 Math Key Idea 1 34,39,40,41, 76a 52a,54,55 Math Key Idea 2 36,42,57,58 Math Key Idea 3 33,45,47,52b 75,76b Sci. Inq. Key Idea 1 64,67,72 Sci. Inq. Key Idea 2 60 Sci. Inq. Key Idea 3 32,35,37,38,43, 44,48,49,51,56, 59 [12] 63,68,77,78,79,81 Eng. Des. Key Idea 1 Standard 2 Key Idea ,72 Key Idea 2 Standard 6 Key Idea 1 Key Idea ,66,70,71 Key Idea 3 80 Key Idea 4 Key Idea 5 Standard 7 Key Idea 1 73,74 Key Idea 2 Standard 4 Process Skills Key Idea 3 32,33,34,35,36, 38,39,40,41,42, 43,44,45,48,49, 50,51,52,56,57, 58,59,60,61,62 Key Idea 4 Key Idea 5 37 Standard 4 Key Idea 3 1,2,3,4,5,6,8, 11,12,13,14,15, 16,17,18,19,21, 22,23,24,25,26, 27,28,29 Key Idea 4 Key Idea 5 63,65,66,67,68, 69,70,75 46,47 71,77,78 32,33,34,35,36, 38,39,40,41,42, 43,44,45,48,49, 50,51,52a, 52b,53,56,57, 58,59,60, ,47 7,9,10,20,31 37,62 Reference Tables 2002 Edition 3,4,6,15,22 33,34,35,37,40, 41,45,47,48,53, 57,58,59 63,64,65,66,67, 68,69,70,75,76a, 76b,80,81 71,72,73,74,77, 78,79 69,71,72,75,79,81
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