1. A student observes that a plant in a sunny window grows taller than a plant in a dark closet. Which of the following statements is the 'Claim' in their scientific argument?
- A. The plant in the sun grew 10 cm.
- B. Plants require sunlight to grow.
- C. The plant in the closet grew 2 cm.
- D. The experiment used two identical pots.
2. Consider the following argument: 'My claim is that this rock is an igneous rock. I can see visible crystals in it.' What essential component of the CER framework is missing?
- A. A claim
- B. Evidence
- C. Reasoning
- D. A question
3. Which statement best demonstrates a complete and strong scientific argument using the CER framework?
- A. The substance is an acid. I know this because the litmus paper turned red, and acids turn litmus paper red.
- B. The litmus paper turned red. This means the substance is an acid. This is a chemical property of acids.
- C. Claim: The substance is an acid. Evidence: It is a sour-tasting liquid.
- D. Acids turn litmus paper red. I put litmus paper in the substance, and it turned red. Therefore, it is an acid.
4. In the Claim, Evidence, Reasoning (CER) framework for constructing a scientific argument, what is the primary role of the 'Reasoning' component?
- A. To present the raw data and measurements collected during an investigation.
- B. To provide a one-sentence answer to the initial scientific question.
- C. To connect the evidence to a broader scientific principle, explaining why the data supports the claim.
- D. To summarize the methods and materials used in the experiment.
5. A scientist argues that a newly discovered planet has a liquid water ocean. Which of the following statements would serve as 'Evidence' for this argument?
- A. Planets at a similar distance from their star often have liquid water.
- B. Therefore, the planet is a good candidate for harboring life.
- C. The presence of liquid water is a key ingredient for life as we know it.
- D. Spectrometer readings detected water vapor and surface reflections consistent with a liquid body.
6. A team of climatologists studies a melting glacier. They use satellite images to measure its shrinking area, ice-penetrating radar to measure its thinning, and stream gauges to measure increased meltwater runoff. What scientific principle does this approach best illustrate?
- A. The law of superposition
- B. The use of a single, definitive experiment
- C. The preponderance of evidence
- D. The principle of uniformitarianism
7. In scientific research, what is the principle of "preponderance of evidence"?
- A. A conclusion is considered valid only if it is supported by a single, revolutionary experiment.
- B. A scientific argument is strengthened when multiple, independent lines of inquiry all point to the same conclusion.
- C. The theory proposed by the most senior scientist in a field is given the most weight.
- D. Evidence that is older is considered more reliable than more recently collected data.
8. Why is relying on a preponderance of evidence crucial for building reliable scientific conclusions?
- A. It guarantees that the conclusion will never be challenged or revised in the future.
- B. It makes the research process faster by allowing scientists to use any data they can find.
- C. It is the only method accepted for publishing in scientific journals, regardless of the field of study.
- D. It reduces the chance of being misled by errors, anomalies, or limitations from a single data source by ensuring the conclusion is supported from multiple angles.
9. A geologist finds a single, unusual fossil in a rock layer and immediately proposes a new theory about a mass extinction event. Why might other scientists be skeptical of this conclusion?
- A. New theories about mass extinctions are no longer being accepted.
- B. The conclusion is based on a single data point, not a preponderance of evidence.
- C. The geologist did not use GPS data in their initial investigation.
- D. The fossil was not found by a more senior geologist.
10. A detective investigating a theft finds the suspect's fingerprints at the scene, security footage of the suspect nearby, and the stolen item in the suspect's home. The detective's approach is most analogous to which scientific concept?
- A. Forming a hypothesis without any data
- B. Relying on the preponderance of evidence
- C. Replicating a single experiment
- D. Focusing only on eyewitness testimony