Entry Exam Category: High School Equivalency Exams
Course: General Education Development (GED)
Exam: GED Science and Practice Test

Practice Question

Limestone and marble are often used in buildings. Both types of rock contain calcium carbonate, which is sensitive to chemical weathering by acids. A scientist conducted an experiment to test the effect of acid strength on calcium carbonate... Which change would reduce the possibility of error in the experiment?
Question visual

Answer Choices

  • A: performing the experiment with a different acid in the solution
  • B: performing multiple trials for each solution pH
  • C: using more of the acidic solution
  • D: using a solution with a pH below 3.00

Correct Answer: B

Rationale: Multiple trials increase reliability by reducing random errors and confirming consistency of results.

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