Which observation record most appropriately includes both qualitative and quantitative data?

Correct answer: The solution was blue and its temperature was thirty two degrees Celsius

The direct answer is B: the solution was blue and its temperature was 32 °C. Qualitative data describe qualities in words, such as colour, texture, or appearance. Quantitative data give a measurable amount using a number and usually a unit. Option B contains both: “blue” is qualitative because it describes colour, and 32 °C is quantitative because it gives a temperature with a numerical value and unit. Option A is not the best record because “beautiful” and “pleasant” are personal judgments, not precise observations. Option C uses uncertain words such as “perhaps” and gives no measured values; “heavy” is vague unless mass is measured. Option D gives general judgments—“useful” and “safe”—without evidence or measurement, so it does not appropriately provide both data types. A strong observation separates what was directly noticed from personal opinion and records measurements clearly. Memory cue: descriptive word plus measured number and unit means qualitative plus quantitative data.