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Experimental design

  • ATI TEAS
  • Science: Scientific Reasoning
  • Multiple choice
  • Difficulty 3 of 5

Question

Which observation should the student record to address the question?

  1. Color of the ramp✗ Incorrect

    Ramp color is not the response being studied.

  2. Distance each car rolls beyond the ramp✓ Correct

    Travel distance is the outcome associated with the surface comparison.

  3. Brand printed on each car✗ Incorrect

    The brand marking does not measure the car’s travel.

  4. Length of the student’s pencil✗ Incorrect

    Pencil length is unrelated to the proposed response.

Answer

B. Distance each car rolls beyond the ramp

Rationale

The surface is the selected difference in this setup. Measuring travel distance provides the response needed for the proposed comparison.

RememberIdentify the chosen difference, the observed response, and the conditions kept consistent.

Sources

  • United States U.S. Environmental Protection Agency · License: US government work (public domain) · Retrieved · Page 21

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