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Shortcut used: Identify the hypothesis, changed variable, measured outcome, controls, and evidence before answering.
Solve in 3 steps:
- Identify the first relation/pattern.
- Apply the same rule to the missing part.
- Reject options that break the rule.
Common mistake: Do not pick a merely related option; it must match the exact pattern.
Question 9
Multiple Choice Question
Question
Experiment 2: A researcher compares three insulating materials. Identical cups receive equal volumes of water initially at 80°C. One cup is wrapped in cotton, one in foam, and one in aluminum foil. A fourth cup is left unwrapped. All cups remain in the same room, and water temperature is measured after 30 minutes.
Which factor must be kept the same to make the material comparison fair?
Explanation
Correct Answer: A
ANSWER
Correct Answer: A
Method / Topic: Scientific Reasoning
Equal starting temperatures prevent initial heat differences from biasing the comparison.
Why this answer is correct
The correct option preserves the same pattern.
Short Explanation
Equal starting temperatures prevent initial heat differences from biasing the comparison.
Detailed Explanation
Question
Experiment 2: A researcher compares three insulating materials. Identical cups receive equal volumes of water initially at 80°C. One cup is wrapped in cotton, one in foam, and one in aluminum foil. A fourth cup is left unwrapped. All cups remain in the same room, and water temperature is measured after 30 minutes.
Which factor must be kept the same to make the material comparison fair?
ANSWER
Correct Answer: A
Method / Topic: Scientific Reasoning
Equal starting temperatures prevent initial heat differences from biasing the comparison.
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Question 9
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Identify the hypothesis, changed variable, measured outcome, controls, and evidence before answering.
Solve in 3 steps:
- Identify the first relation/pattern.
- Apply the same rule to the missing part.
- Reject options that break the rule.
Common mistake: Do not pick a merely related option; it must match the exact pattern.
Question
Experiment 2: A researcher compares three insulating materials. Identical cups receive equal volumes of water initially at 80°C. One cup is wrapped in cotton, one in foam, and one in aluminum foil. A fourth cup is left unwrapped. All cups remain in the same room, and water temperature is measured after 30 minutes. Which factor must be kept the same to make the material comparison fair?
Explanation
Correct Answer: A
ANSWER
Correct Answer: A
Method / Topic: Scientific Reasoning
Equal starting temperatures prevent initial heat differences from biasing the comparison.
Why this answer is correct
The correct option preserves the same pattern.
Short Explanation
Equal starting temperatures prevent initial heat differences from biasing the comparison.
Detailed Explanation
Question
Experiment 2: A researcher compares three insulating materials. Identical cups receive equal volumes of water initially at 80°C. One cup is wrapped in cotton, one in foam, and one in aluminum foil. A fourth cup is left unwrapped. All cups remain in the same room, and water temperature is measured after 30 minutes.
Which factor must be kept the same to make the material comparison fair?
ANSWER
Correct Answer: A
Method / Topic: Scientific Reasoning
Equal starting temperatures prevent initial heat differences from biasing the comparison.
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Identify the hypothesis
changed variable
measured outcome
controls
and evidence before answering.
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