Question

7 how can posing a more specific question improve a scientific investigation? a by making the experiment more challenging b by eliminating the need for a control group c by clarifying what data needs to be collected d by shortening the time required for the investigation

Explanation:

• Option A: Making an experiment more challenging is not a goal of a scientific investigation; the goal is to find answers, so A is incorrect.
• Option B: A control group is essential in most scientific experiments to compare results, and a specific question doesn't eliminate this need, so B is incorrect.
• Option C: A more specific question helps define the scope of the investigation, which in turn clarifies what data is relevant and needs to be collected. This is a key part of improving a scientific investigation.
• Option D: A specific question doesn't necessarily shorten the time of the investigation; the time depends on the complexity of the study, not just the specificity of the question, so D is incorrect.

Answer:

C. By clarifying what data needs to be collected