Qualitative observation is defined as observation without tools, less precise.

• A. Observation without tools, less precise
• B. Measurement with tools, more precise
• C. A chemical reaction with color change
• D. A numerical value with units

Answer: (A)

Qualitative observation means describing what you notice using your senses without using measuring tools or numbers. It focuses on qualities like color, shape, texture, or smell rather than how much or how big something is. Because no measurements are taken, the information is descriptive and not expressed with numeric values, so it’s less precise for comparing exact amounts, but it’s great for noticing features and differences. The other ideas describe using tools to measure or express results with numbers, which is quantitative rather than qualitative. So describing something as “observation without tools, less precise” captures the idea of qualitative observation.