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Craft and StructureHardPurpose of describing an experiment

Craft and Structure practice question

To test whether a wall's colour affects how hot it becomes, the students painted three identical boxes white, grey, and black and left them in the sun with a thermometer inside each. By noon the black box was 14 degrees warmer than the white one.

Which choice best states the main purpose of the text?

  1. A. To describe how an experiment was set up and what it found.Correct
  2. B. To recommend painting walls white.
  3. C. To explain why black absorbs heat.
  4. D. To criticise the students' method.

Answer: A. To describe how an experiment was set up and what it found.

Setup, then result.

Why the other answers are wrong

B. To recommend painting walls white.
No recommendation is made.
C. To explain why black absorbs heat.
No explanation of the physics.
D. To criticise the students' method.
No criticism.

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