What limitation remains in an investigation if the temperature of a liquid is not recorded?

Correct answer: An important measurement will be missing

The direct answer is D: an important measurement will be missing. In an investigation, observations and measurements are recorded so that another person can understand exactly what happened and compare results fairly. Temperature is a measurable quantity. It can affect the properties of a liquid and the result of an experiment, so leaving it out creates incomplete evidence. Step by step: first identify the variable being observed; next measure it with a suitable instrument such as a thermometer; then write the value, unit, and conditions in the record. Option A is wrong because failing to record temperature does not change the liquid’s name. Option B is wrong because an experiment does not automatically stop merely because one reading was omitted. Option C is wrong because missing data usually makes a scientific question or result less clear, not clearer. Option D is correct because temperature is useful quantitative information and its absence is a genuine limitation. Memory cue: an investigation needs complete records, including important measurements.