Transcript SQUADS #4 - Ronald W. Reagan IB High School

SQUADS #2
CPW
10th Grade Science
Learning Intentions - Today, we will address these College Readiness
Standards in Science:
1.
2.
3.
4.
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
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:
A.34°C
B.42°C
C.50°C
D.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?
A. Reaction temperature
B. Addition of NaCl
C. Addition of Fe
D. 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?
A. 0.50 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg
powder
B. 0.50 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg
ribbon
C. 0.70 mol Fe powder, 0.125 mol NaCl, and 0.10 mol of Mg
powder
D. 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?
A. NaCl absorbs heat produced in the reaction, causing the
Mg(OH)2 to melt off of the Mg surface.
B. NaCl binds with Fe to inhibit the reaction of Mg with H2O.
C. NaCl reacts with Mg(OH)2 to form a stronger barrier
against H2O.
D. 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.