Which best describes the role of observation in scientific inquiry?

• A. To collect sensory evidence that can be described and measured
• B. To guess outcomes without data
• C. To replace experiments
• D. To rely on opinions rather than data

Answer: (A)

Observation in scientific inquiry means carefully gathering evidence from the natural world that can be described and measured. This evidence provides the data you use to ask questions, form hypotheses, and design tests. When you describe what you see and, when possible, quantify it with measurements, your conclusions become testable and more reliable because others can understand and replicate what you did. In science, data gathered through observation helps separate what is simply noticed from what is actually supported by evidence.

This is why it isn’t about guessing outcomes without data, replacing experiments, or relying on opinions rather than evidence. Observations give you the concrete material that experiments can test and that can be evaluated by others.