Carry out the Investigation and Record Results

Carrying out the Investigation

Wear appropriate safety gear such as lab coat, safety glasses, and gloves to all experimental segments.
Ensure that all necessary equipment is gathered and in working condition.
Affirm that all tools and surfaces are clean to circumvent cross-contamination which could affect the validity of results.

Rigorously follow the method described in your plan. Particular attention is paid to manipulating the independent variable and measuring the dependent variable.
Be meticulous about maintaining control variables to ensure a fair test and valid results.
Endeavour to keep the experiment as precise and accurate as possible by reducing random and systematic errors.
If anything goes unpredicted or amiss, note this down in an observation log as it may impact your conclusion.

Organise data in a table with columns for the independent and dependent variables, and possibly, other useful recorded variables.
Record accurate and precise observations, avoiding any personal bias. Measurements should be made as precise as possible with the equipment available.
Make a note of both qualitative and quantitative data. Descriptions of changes are as important as numerical data in some experiments.
Consider repeating the experiment to collect multiple data sets for reliability.

Regularly check results for anomalies or outliers that may affect your analysis or conclusion.
Check the consistency of results among repetitions. Any substantial variation should be noted and investigated.
Always consider whether the collected data supports the hypothesis. If it does or does not, make a note for your conclusion.