A paper claims that material B cools faster than material A under its test conditions. It supports this with measured cooling times. Which separates the claim from the evidence?

• Claim: faster cooling; evidence: measured cooling times
• Claim: measured cooling times; evidence: faster cooling
• Claim: faster cooling; evidence: the authors' confidence

As one reading strategy, you plan to identify a paper's proposed conclusion, inspect the results offered in support, then check how those results were obtained. Which route matches this plan?

• Method, then claim, then supporting results
• Claim, supporting results, then method
• References, then author list, then journal

A paper tests 12 volunteers from one laboratory and extends its conclusion to all adults. Which assumption needs checking for that generalization?

• The sampling method supports inference about all adults.
• Repeated tests make the volunteers representative of everyone.
• A shared laboratory removes every possible selection bias.

A paper reports a 3°C difference between runs using one sensor. Which test directly checks whether the sensor's offset changed between the start and end of the experiment?

• Take more readings without measuring any stable reference.
• Measure a stable reference before and after the runs.
• Hide the run labels while leaving calibration unchecked.

Material A cools in a room held at 20°C and material B in a room held at 30°C. A paper attributes their different cooling times entirely to material. Which concern challenges that attribution?

• More specimens automatically remove the unequal-temperature effect.
• Matching chart colors make the experimental conditions comparable.
• Room temperature may explain the cooling difference.

A paper uses a model to estimate a quasar's distance from redshift, then infers high luminosity from that distance and apparent brightness. Which assumption needs checking?

• The redshift is mainly cosmological in the adopted model.
• Apparent brightness gives luminosity without any distance estimate.
• Objects in the same sky direction must have identical distances.

A paper estimates a difference of 2 units with a 95% confidence interval from -1 to 5 units. This interval alone establishes that the difference is positive.

A quasar and galaxy appear close together on the sky but have very different redshifts. Without independent evidence of association, which interpretation remains possible?

• Their sky proximity proves they occupy the same physical region.
• They are unrelated objects aligned at different distances.
• The redshift mismatch proves the distance model has failed.