How do you keep each viewpoint's claim and reasoning straight while you read?
Tracking viewpoints on ACT Science: capturing each view's central claim in a phrase, noting its key reasoning, and answering detail questions by returning to the right view's argument.
A focused answer on tracking viewpoints in ACT Science Conflicting Viewpoints passages: summarising each view's central claim in a short phrase, noting the main reasoning behind it, distinguishing claims from supporting evidence, and returning to the correct view to answer detail questions.
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What this topic is asking
Conflicting Viewpoints questions live or die on whether you have each view's claim and reasoning clear in your head. Because the passage is dense text and the questions jump between views, the skill is active tracking: as you read, fix each view's central claim in a short phrase, note its main reasons, and keep the views distinct so you can return to the right one for any detail question.
Capture each claim in a phrase
The core habit is to summarise each view in a few words as you read it. Do not try to memorise every sentence; instead, after reading a view, finish the thought "this view says the cause is ...". For example:
- "Scientist 1: a comet impact caused it."
- "Scientist 2: volcanic eruptions caused it."
A phrase per view is enough to answer most "according to Scientist X" questions and to anchor the comparison questions. Many students lightly mark or note the claim beside each view so they can find it instantly.
Note the main reasoning
Beyond the claim, note why each view holds its position: the one or two key reasons or pieces of evidence it cites. Scientist 1 might point to a worldwide iridium layer (common in comets); Scientist 2 might point to vast ancient lava fields of the right age. You do not need every supporting detail, but knowing the main support lets you answer questions about how a view defends itself and how new evidence would affect it.
Distinguish claim from evidence
A frequent ACT move is to ask whether a particular statement is a view's claim or a piece of evidence it offers. The distinction:
- The claim is the view's main position (what it says caused or explains the phenomenon).
- Evidence is a fact or observation cited in support of the claim.
The iridium layer is evidence; "a comet impact caused the extinction" is the claim. Confusing the two leads to wrong answers on evaluation questions, where you must judge whether new evidence strengthens the claim. This sets up the reasoning in using evidence to support or weaken a view.
Return to the text for details
Even with good tracking, do not answer detail questions from memory alone. When a question asks what a specific view claims or cites, go back to that view's paragraph and confirm. Your phrase tells you which view and where to look; the text confirms the exact answer. This is faster than rereading both views and prevents the common error of attributing one view's point to the other.
Try this
Q1. What two things should you capture for each viewpoint as you read, and how briefly? [2 points]
- Cue. The central claim in one short phrase (the cause or mechanism proposed) and the one or two main reasons or pieces of evidence it offers.
Q2. A statement in Scientist 2's argument cites a fact in support of the explanation. Is this the claim or evidence, and why does the distinction matter? [2 points]
- Cue. It is evidence (a fact cited to support the claim), not the claim itself; the distinction matters because evaluation questions ask whether new evidence strengthens or weakens the claim.
Exam-style practice questions
Practice questions written in the style of ACT exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
ACT Science (style)1 marksScientist 1 argues that a comet impact caused a mass extinction; Scientist 2 argues that prolonged volcanic eruptions caused it. According to Scientist 2, the primary cause of the extinction was: (A) a comet impact. (B) volcanic eruptions. (C) a drop in sea level. (D) overhunting.Show worked answer →
A 1-point detail question answered by returning to the right view.
The correct answer is (B), volcanic eruptions. The question asks specifically what Scientist 2 claims, so you return to Scientist 2's argument, where the central claim is that prolonged volcanic eruptions caused the extinction. (A) is Scientist 1's claim, and (C) and (D) appear in neither argument. Always answer a "according to Scientist X" question from Scientist X's text.
ACT Science (style)1 marksIn Scientist 1's argument, the statement 'a thin layer of the rare metal iridium is found worldwide at that rock layer' functions as: (A) the central claim. (B) evidence offered to support the claim. (C) a point both scientists reject. (D) an unrelated fact.Show worked answer →
A 1-point item on distinguishing a claim from its evidence.
The correct answer is (B). The central claim is that a comet impact caused the extinction; the iridium layer is a piece of evidence offered in support, because iridium is common in comets. (A) confuses evidence with the claim, (C) is wrong since it backs Scientist 1, and (D) understates its role. Telling the claim apart from its supporting evidence is essential for evaluation questions.
Related dot points
- The anatomy of a Conflicting Viewpoints passage on ACT Science: a shared phenomenon followed by two or more competing explanations that differ in their premises, read as arguments rather than data.
A focused answer on the structure of an ACT Science Conflicting Viewpoints passage: a shared phenomenon introduced, then two or more competing explanations (scientists or hypotheses) that disagree because of differing premises, read as arguments and the most reading-heavy format on the section.
- Agreement and disagreement on ACT Science: identifying the shared facts or premises both viewpoints accept and pinpointing the specific claim on which they diverge.
A focused answer on agreement and disagreement questions in ACT Science Conflicting Viewpoints passages: finding the shared facts or observations both views accept, pinpointing the exact claim on which they diverge, and testing a statement against each view to see who would accept it.
- Evaluating evidence on ACT Science: deciding whether a new finding supports, weakens, or is neutral to a viewpoint by checking it against that view's specific claim and reasoning.
A focused answer on evidence-evaluation questions in ACT Science Conflicting Viewpoints passages: judging whether a new finding supports, weakens, or is neutral to a view by checking it against the view's specific claim, and recognising evidence that cuts against the rival view.
- A time strategy for the reading-heavy Conflicting Viewpoints passage on ACT Science: when to attempt it, how to read it once efficiently, and how to split claim-detail questions from evaluation questions.
A focused answer on managing the most text-heavy ACT Science passage: deciding when to attempt Conflicting Viewpoints in your pacing, reading the arguments once with active claim tracking, and handling the quicker claim-detail questions before the slower evaluation questions.
- Evaluating models and inferences on ACT Science: deciding which conclusion the data support, whether a hypothesis is consistent with a result, and rejecting claims that go beyond the evidence.
A focused answer on the Evaluation reporting category of ACT Science: deciding which conclusion the data actually support, judging whether a hypothesis is consistent with a result, and rejecting answers that overgeneralise or claim more than the evidence shows.
Sources & how we know this
- Description of the ACT Science Test — ACT, Inc. (2025)
- ACT Science Practice Test Questions — ACT, Inc. (2025)