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About This Drill
ACT Science — Conflicting Viewpoints — Drill 2 is a Science practice drill covering Conflicting Viewpoints. It contains 5 original questions created by Brian Stewart, a Barron's test prep author with over 20 years of tutoring experience.
ACT Conflicting Viewpoints questions ask you to compare two competing scientific hypotheses and evaluate their support. In this drill, two scientists debate how the Moon formed — the Giant Impact Hypothesis versus co-accretion — requiring analysis of evidence, assumptions, and how new findings would affect each argument.
Questions in This Drill
- According to Scientist 1, what explains the Moon's disproportionately small iron core?
- Which of the following observations would both Scientist 1 and Scientist 2 accept as accurate?
- Which of the following findings, if confirmed, would most weaken Scientist 2's hypothesis?
- Scientist 2 uses the nearly identical oxygen isotope ratios of the Moon and Earth as support for co-accretion. This argument depends on which of the following assumptions?
- Analysis of ancient lunar breccia samples reveals microscopic glassy spherules with internal structures produced only by extreme shock pressures -- features associated with hypervelocity impacts. This finding would most strongly support the hypothesis of: