SQUADS #2 CPW 10th Grade Science Learning Intentions - Today, we will address these College Readiness Standards in Science: Scientific Investigation, 24-27 Scientific Investigation, 20-23 Evaluation of Models, Inferences, and Experimental Results, 24-27 Evaluation of Models, Inferences, and Experimental Results, 28-32 SQUADS #2 Success Criteria – You know you are successful when you understand the methods and tools used in a complex experiment, select a data presentation that supports a hypothesis, and use new information to make a prediction based on a model.

Please Note You have 4 Minutes to read your passage. You will have 1 minute and 15 seconds to work on each question individually. You will have 1 minute and 30 seconds to work as a group and write your rationales for each answer.

10th Grade Science #1. If a trial had been done in Experiment 3 with 0.060 mol of NaCl added, the maximum temperature increase of the mixture that would have occurred within 15 min would have been closest to: 34°C 42°C 50°C 62°C

10th Grade Science #2. Which of the following factors affecting the reaction of Mg and H2O was studied in Experiment 1, but not in Experiments 2 or 3? Reaction temperature Addition of NaCl Addition of Fe Surface area of Mg

10th Grade Science #3. An engineer is designing an FRH, to be used with 100 mL of H2O, that will most rapidly generate the greatest amount of heat with the least amount of materials. Based on the results of Experiments 1, 2, and 3, which of the following specifications should she choose? 0.50 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg powder 0.50 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg ribbon 0.70 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg powder 0.70 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg ribbon

10th Grade Science #4. It has been observed that as Mg and H2O react, the Mg(OH)2 (magnesium hydroxide) that is produced forms an unreactive coating on the Mg surface. Which of the following models for why NaCl speeds up the reaction is most consistent with this observation and the results of the experiments? NaCl absorbs heat produced in the reaction, causing the Mg(OH)2 to melt off of the Mg surface. NaCl binds with Fe to inhibit the reaction of Mg with H2O. NaCl reacts with Mg(OH)2 to form a stronger barrier against H2O. NaCl reacts with Mg(OH)2, removing the coating from the Mg, allowing more contact with H2O.

CPW 10th Grade Science Repeat the questions with your squad members. Be sure to write a rationale. If you don’t write a rationale, you won’t learn as much. Your brain is like a muscle. Use it! 1 minute and 30 seconds per question for Squad Mode. After the rationale writing is done, launch the Answers video.