Exemplar Grade 6 Science Test Questions

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1 Exemplar Grade 6 Science Test Questions discoveractaspire.org

2 2015 by ACT, Inc. All rights reserved. ACT Aspire is a registered trademark of ACT, Inc. 4087

5 Answer Key Answer Key This section presents the grade, item type, DOK level, alignment to the ACT Aspire reporting categories, and correct response for each question. Each question is accompanied by an explanation of the question and the correct response as well as improvement idea statements for ACT Aspire Science. Students did 2 experiments to estimate the mass of water present in margarines and in hand lotions. Experiment 1 The students measured out a 25 gram (g) sample of Margarine A in a glass beaker. The sample was heated until it completely melted. Upon cooling, a solid layer formed on top of a liquid water layer. A small hole was made in the solid layer, and the liquid water was poured out. The mass of solid remaining in the beaker was measured. Then, the mass of water in the margarine sample was calculated. The procedure was repeated for Margarines B, C, and D (see Table 1). Table 1 Margarine Mass of solid remaining (g) Mass of water in margarine sample (g) A 24 1 B C 19 6 D Experiment 2 The students measured out a 25 g sample of Lotion E in a glass beaker. The sample was heated to boiling and then allowed to gently boil for 30 minutes. After the mixture cooled to room temperature, the mass of lotion remaining in the beaker was measured. Then, the mass of water in the lotion sample was calculated. The procedure was repeated for Lotions F, G, and H (see Table 2). Table 2 Lotion Mass of lotion remaining (g) Mass of water in lotion sample (g) E 19 6 F 21 4 G 20 5 H

6 Answer Key Question 1 Sequence Grade Question type DOK level Reporting category Correct response 1 6 Selected Response 2 Interpretation of Data C This question requires the examinee to find two pieces of data in a table and to compare those data using a simple calculation. Correct Response The mass of solid remaining for Margarine A was 24 g, and the mass of solid remaining for Margarine D was 11 g, so the mass remaining for Margarine A is 13 g greater than the mass remaining for Margarine D. Improvement Idea Statements Reporting category Grade Low statement (scored below ACT Readiness Range) High statement (scored at or above ACT Readiness Range) Interpretation of Data 6 Generate and interpret a greater number and variety of data presentations (scientific tables, line graphs, diagrams). Use trends to extend data in data presentations (interpolation, extrapolation). Carefully consider the intended audience to determine the most accurate and useful way to present data. Use mathematical concepts (interpolation, extrapolation, slope) to interpret and extend from graphs. 4

7 Answer Key Question 2 Sequence Grade Question type DOK level Reporting category Correct response 2 6 Selected Response 2 Scientific Investigation B This question requires the examinee to understand the design of the experiment. Correct Response The students needed four 25 g samples of lotion, so the minimum mass of lotion is 100 g. Improvement Idea Statements Reporting category Grade Low statement (scored below ACT Readiness Range) High statement (scored at or above ACT Readiness Range) Scientific Investigation 6 Generate questions that can be investigated and then design and perform controlled experiments to validly test the questions. Examine complex scientific experiments involving multiple variables. Generate hypotheses and then design and perform controlled experiments involving multiple variables to validly test the hypotheses. Evaluate experiments for possible sources of measurement error. 5

8 Answer Key Question 3 Sequence Grade Question type DOK level Reporting category Correct response 3 6 Selected Response 2 Evaluation of Models, Inferences, and Experimental Results A This question requires the examinee to determine which experimental results are consistent with a given prediction. Correct Response According to the tables, the only margarine sample that has less water than each lotion sample is Margarine A. Improvement Idea Statements Reporting category Grade Low statement (scored below ACT Readiness Range) High statement (scored at or above ACT Readiness Range) Evaluation of Models, Inferences, and Experimental Results 6 Compare and evaluate the results of scientific experiments and compare and evaluate competing scientific explanations. Examine ways to improve on scientific experiments and explanations. Evaluate competing scientific explanations by generating predictions based on each explanation. Explain why the results of scientific experiments support or do not support a scientific explanation. 6

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