ACT Science Flashcards: Drawing Conclusions And Evaluating Claims

What this deck covers

This deck focuses on Drawing Conclusions And Evaluating Claims, giving you a quick way to review the definitions, rules, and examples that matter most for ACT Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Identify the term for a statement that can be either true or false.

Answer: Proposition. A declarative statement with truth value.

Flashcard 2: Which term describes a testable statement in scientific research?

Answer: Hypothesis. A predictive statement that can be tested.

Flashcard 3: What is the key flaw if a claim states that $X$ causes $Y$ based only on a trend in a graph?

Answer: Confusing correlation with causation. Assumes causation from correlation alone.

Flashcard 4: Identify the error: 'The study concluded without analyzing all data.'

Answer: Conclusions should be based on comprehensive data analysis. Incomplete analysis leads to invalid results.

Flashcard 5: Identify the term for data collected through observation or experimentation.

Answer: Empirical evidence. Data obtained through direct measurement or testing.

Flashcard 6: What is the best evidence that a claim is supported by an experiment?

Answer: A consistent change in the dependent variable when only the independent variable changes. Shows clear cause-and-effect relationship.

Flashcard 7: Which component of an experiment helps to validate a conclusion?

Answer: Control variable. Kept constant to isolate the variable being tested.

Flashcard 8: Which type of claim requires empirical evidence for support?

Answer: Scientific claim. Must be testable through observation or experiment.

Flashcard 9: What is a critical aspect of evaluating scientific arguments?

Answer: Assessing the quality of the evidence. Examines reliability and relevance of supporting data.

Flashcard 10: What does it mean to 'draw a conclusion' in an experiment?

Answer: To infer results based on data analysis. Uses experimental data to reach logical outcomes.

Flashcard 11: What is the correct interpretation of an outlier when evaluating a claim?

Answer: It may indicate error or real variation; do not ignore without justification. Could be meaningful data, not just error.

Flashcard 12: What is a conclusion in scientific research?

Answer: A judgment based on evidence and reasoning. It synthesizes data to form logical interpretations.

Flashcard 13: Which reasoning type starts with a general statement to reach a specific conclusion?

Answer: Deductive reasoning. Applies general principles to specific cases.

Flashcard 14: What is a control group used for when evaluating an experimental claim?

Answer: A baseline for comparison without the treatment. Shows what happens without treatment.

Flashcard 15: Identify the error: 'The hypothesis was proven by a single experiment.'

Answer: Hypotheses are supported, not proven, by experiments. Single studies provide support, not definitive proof.

Flashcard 16: Identify the best conclusion: Data show $Y$ increases as $X$ increases in all trials. What is supported?

Answer: $Y$ increases with $X$ (positive association). Clear positive trend in all data.

Flashcard 17: What must be controlled to ensure the reliability of experimental results?

Answer: Variables. Eliminates alternative explanations for results.

Flashcard 18: What is the main purpose of repeated trials when evaluating a claim?

Answer: To assess reliability and reduce random error. Multiple trials show consistency.

Flashcard 19: What term describes a claim limited to the measured range of the data?

Answer: Interpolation. Estimate within measured data range.

Flashcard 20: What is the primary purpose of evaluating claims in science?

Answer: To assess the validity and reliability of the claim. Ensures claims are supported by solid evidence.

Flashcard 21: Identify the correct interpretation: After adding enzyme, reaction rate doubles. What variable changed?

Answer: Enzyme concentration (independent variable) increased. Enzyme was the manipulated variable.

Flashcard 22: Identify the term for an assertion supported by evidence.

Answer: Claim. An assertion that requires evidence for support.

Flashcard 23: Which option is the independent variable: "Light intensity was varied and oxygen production was measured"?

Answer: Light intensity. Light was varied by the experimenter.

Flashcard 24: Which option is best supported if two lines on a graph cross at $X=5$?

Answer: The two conditions have equal $Y$ at $X=5$. Lines intersect at that point.

Flashcard 25: Identify the flaw: A claim states "$X$ causes $Y$" but the study is observational only. What is the flaw?

Answer: Causation is not established without controlled manipulation. Need controlled experiment for causation claims.

Flashcard 26: What is a control group used for when evaluating an experimental claim?

Answer: A baseline for comparison without the treatment. Shows what happens without treatment.

Flashcard 27: What is the most appropriate conclusion if two groups overlap heavily in their data ranges?

Answer: Any difference is not clearly supported by the data. Overlapping ranges suggest no clear difference.

Flashcard 28: Which method involves drawing conclusions from general principles?

Answer: Deductive reasoning. Applies broad rules to specific situations.

Flashcard 29: What is a distinguishing feature of a scientific theory?

Answer: It is supported by a large body of evidence. Extensive testing validates theoretical frameworks.

Flashcard 30: What is a common error when evaluating claims?

Answer: Confirmation bias. Seeking only evidence that confirms preconceptions.

Flashcard 31: Which of the following is a criterion for evaluating scientific arguments?

Answer: Relevance of evidence. Evidence must relate directly to the claim.

Flashcard 32: Which option best evaluates a claim that changes the definition of "success" between groups?

Answer: The comparison is invalid due to inconsistent criteria. Changing definitions invalidates comparison.

Flashcard 33: Which type of claim requires empirical evidence for support?

Answer: Scientific claim. Must be testable through observation or experiment.

Flashcard 34: What is a confounding variable in evaluating a scientific claim?

Answer: A third factor that changes with the independent variable. Uncontrolled factor that affects results.

Flashcard 35: What should be considered when determining the credibility of a source?

Answer: Author's credentials and publication reputation. Expert qualifications increase source reliability.

Flashcard 36: Which option best evaluates a claim when the study has no control group?

Answer: A baseline comparison is missing; the claim is weakened. No control means no valid comparison.

Flashcard 37: Identify the flaw: The control and treatment groups were measured with different instruments. What is the flaw?

Answer: Measurement method is a confounding factor. Different tools introduce systematic bias.

Flashcard 38: What does it mean to 'draw a conclusion' in an experiment?

Answer: To infer results based on data analysis. Uses experimental data to reach logical outcomes.

Flashcard 39: Which component of an experiment helps to validate a conclusion?

Answer: Control variable. Kept constant to isolate the variable being tested.

Flashcard 40: What is a common mistake when drawing conclusions from data?

Answer: Overgeneralization. Extending findings beyond appropriate scope.

Flashcard 41: Which logical error involves assuming a causal relationship where none exists?

Answer: Post hoc ergo propter hoc. Assumes causation from temporal sequence alone.

Flashcard 42: Which type of reasoning uses specific observations to make generalizations?

Answer: Inductive reasoning. Moves from specific cases to broader patterns.

Flashcard 43: What is the primary purpose of evaluating claims in science?

Answer: To assess the validity and reliability of the claim. Ensures claims are supported by solid evidence.

Flashcard 44: What is a common method for identifying bias in research?

Answer: Peer review. Independent experts evaluate research quality.

Flashcard 45: What is the strongest conclusion you may draw from data in a passage?

Answer: Only what is directly supported by the given evidence. Avoids unsupported inferences beyond the data.

Flashcard 46: What is a key element in drawing valid conclusions?

Answer: Evidence-based reasoning. Conclusions must follow logically from data.

Flashcard 47: Which reasoning type starts with a general statement to reach a specific conclusion?

Answer: Deductive reasoning. Applies general principles to specific cases.

Flashcard 48: Which logical error involves assuming a causal relationship where none exists?

Answer: Post hoc ergo propter hoc. Assumes causation from temporal sequence alone.

Flashcard 49: Identify the correct interpretation: After adding enzyme, reaction rate doubles. What variable changed?

Answer: Enzyme concentration (independent variable) increased. Enzyme was the manipulated variable.

Flashcard 50: What is a primary goal of the scientific method?

Answer: To objectively test hypotheses. Eliminates personal bias through systematic testing.

Flashcard 51: Which option is the dependent variable: "Temperature was varied and growth was measured"?

Answer: Growth. Growth was measured as the outcome.

Flashcard 52: Which factor is critical in determining the soundness of a conclusion?

Answer: Logical consistency. Ideas must connect without contradictions.

Flashcard 53: Identify the best conclusion: Two studies agree on direction of effect but differ in magnitude. What is supported?

Answer: Direction is supported; precise magnitude is uncertain. Trend direction is consistent across studies.

Flashcard 54: Identify the correct conclusion: A dose-response curve rises then falls at high dose. What is supported?

Answer: High dose reduces the response compared with moderate dose. High dose shows inhibitory effect.

Flashcard 55: Identify the flaw: The control and treatment groups were measured with different instruments. What is the flaw?

Answer: Measurement method is a confounding factor. Different tools introduce systematic bias.

Flashcard 56: What does a large spread in repeated measurements most directly suggest?

Answer: High random error (low precision). Wide scatter indicates poor repeatability.

Flashcard 57: What type of evidence is based on personal experience or opinion?

Answer: Anecdotal evidence. Personal stories lack systematic verification.

Flashcard 58: What is the process of deriving logical conclusions from premises known to be true?

Answer: Deduction. Uses logical rules to reach certain conclusions.

Flashcard 59: What is the process of deriving logical conclusions from premises known to be true?

Answer: Deduction. Uses logical rules to reach certain conclusions.

Flashcard 60: Which term describes a testable statement in scientific research?

Answer: Hypothesis. A predictive statement that can be tested.

Flashcard 61: What is the strongest conclusion you may draw from data in a passage?

Answer: Only what is directly supported by the given evidence. Avoids unsupported inferences beyond the data.

Flashcard 62: Identify the term for a statement that can be either true or false.

Answer: Proposition. A declarative statement with truth value.

Flashcard 63: What is the best way to evaluate a claim that uses the word "prove" in science?

Answer: Science supports or refutes; it does not prove with certainty. Science provides evidence, not absolute proof.

Flashcard 64: Which option best evaluates a claim that changes the definition of "success" between groups?

Answer: The comparison is invalid due to inconsistent criteria. Changing definitions invalidates comparison.

Flashcard 65: Identify the term for data collected through observation or experimentation.

Answer: Empirical evidence. Data obtained through direct measurement or testing.

Flashcard 66: What is a key element in drawing valid conclusions?

Answer: Evidence-based reasoning. Conclusions must follow logically from data.

Flashcard 67: Which aspect of an argument evaluates its logical soundness?

Answer: Coherence. Measures how well ideas connect logically.

Flashcard 68: What is a common mistake when drawing conclusions from data?

Answer: Overgeneralization. Extending findings beyond appropriate scope.

Flashcard 69: What is the best way to evaluate a claim that uses the word "prove" in science?

Answer: Science supports or refutes; it does not prove with certainty. Science provides evidence, not absolute proof.

Flashcard 70: Identify the correct conclusion: Condition A mean is higher than B, but error bars overlap widely. What follows?

Answer: A higher mean is not clearly a significant difference. Large error bars indicate uncertainty.

Flashcard 71: What is necessary for a conclusion to be considered valid?

Answer: It must logically follow from the evidence. Must be a reasonable outcome of the data.

Flashcard 72: Which term describes the overall reliability of a scientific study?

Answer: Validity. Measures accuracy and trustworthiness of results.

Flashcard 73: Identify the best-supported claim: A treatment group improves and the control group does not. What is supported?

Answer: The treatment is associated with improvement versus control. Treatment group shows positive response.

Flashcard 74: Identify the flaw: A claim states "$X$ causes $Y$" but the study is observational only. What is the flaw?

Answer: Causation is not established without controlled manipulation. Need controlled experiment for causation claims.

Flashcard 75: Which of the following is a criterion for evaluating scientific arguments?

Answer: Relevance of evidence. Evidence must relate directly to the claim.

Flashcard 76: What term describes the process of testing a hypothesis through experiments?

Answer: Scientific method. Systematic approach to testing scientific ideas.

Flashcard 77: Which option is the dependent variable: "Temperature was varied and growth was measured"?

Answer: Growth. Growth was measured as the outcome.

Flashcard 78: Identify the best-supported statement if data show large trial-to-trial variation around the same mean.

Answer: Random error is high; precision is low. High variability reduces measurement quality.

Flashcard 79: What is the key flaw if a claim states that $X$ causes $Y$ based only on a trend in a graph?

Answer: Confusing correlation with causation. Assumes causation from correlation alone.

Flashcard 80: Which method involves drawing conclusions from general principles?

Answer: Deductive reasoning. Applies broad rules to specific situations.

Flashcard 81: What is required to strengthen a scientific claim?

Answer: Supporting evidence and logical reasoning. Strong claims need both data and valid logic.

Flashcard 82: Which option best evaluates a claim that relies on a single outlier point to show an effect?

Answer: The claim is weak; one outlier is insufficient evidence. Single unusual point is unreliable evidence.

Flashcard 83: Identify the error: 'The study concluded without analyzing all data.'

Answer: Conclusions should be based on comprehensive data analysis. Incomplete analysis leads to invalid results.

Flashcard 84: Identify the best conclusion: Results differ between Lab 1 and Lab 2 using the same method. What is supported?

Answer: The effect is not consistently replicated across labs. Different labs got different results.

Flashcard 85: Identify the term for a flawed argument or reasoning.

Answer: Fallacy. An error in logic or reasoning structure.

Flashcard 86: What term describes a claim that goes beyond the measured range of the data?

Answer: Extrapolation. Prediction beyond measured data range.

Flashcard 87: Which option best describes why a larger sample size can strengthen a conclusion?

Answer: It reduces the influence of random variation. More data points reduce random error.

Flashcard 88: What does it mean if two studies give inconsistent results for the same claim?

Answer: The claim is not reliably supported as stated. Contradictory evidence weakens support.

Flashcard 89: Which option best evaluates a claim that extends a linear trend beyond the last data point?

Answer: It is an extrapolation and may be unreliable. Prediction beyond data is uncertain.

Flashcard 90: Identify a method to test the reliability of a claim.

Answer: Replication of results. Independent studies should yield similar results.

Flashcard 91: What does it suggest if measurements are tightly clustered but far from the accepted value?

Answer: High precision but low accuracy (systematic error). Consistent bias in measurements.

Flashcard 92: Which option best describes why a larger sample size can strengthen a conclusion?

Answer: It reduces the influence of random variation. More data points reduce random error.

Flashcard 93: Which relationship is shown when two variables change together but one may not cause the other?

Answer: Correlation (association), not necessarily causation. Co-variation doesn't prove causation.

Flashcard 94: What must be controlled to ensure the reliability of experimental results?

Answer: Variables. Eliminates alternative explanations for results.

Flashcard 95: Which option best evaluates a claim based on $n=2$ subjects per group?

Answer: Support is weak due to very small sample size. Too few subjects for reliable conclusions.

Flashcard 96: Which relationship is shown when two variables change together but one may not cause the other?

Answer: Correlation (association), not necessarily causation. Co-variation doesn't prove causation.

Flashcard 97: Which option best evaluates a claim when the graph axes are unlabeled with no units?

Answer: The claim cannot be properly evaluated without variable identity and units. Missing labels prevent meaningful evaluation.

Flashcard 98: What is the correct conclusion if results match a hypothesis but alternatives were not ruled out?

Answer: The hypothesis is supported, not confirmed as the only explanation. Other explanations remain possible.

Flashcard 99: Which option is best supported if two lines on a graph cross at $X=5$?

Answer: The two conditions have equal $Y$ at $X=5$. Lines intersect at that point.

Flashcard 100: What is an essential step in evaluating claims?

Answer: Verifying the evidence. Confirms the accuracy of supporting data.