Summarize any observations hat you think are significant and could help you explain or support your results. The lab may or may not specifically direct you to make observations,

Purpose and Hypothesis

This section should be a concise summary of the lab .
State the purpose, the main scientific ideas/concepts you are trying to learn about or prove/observe .
State your hypothesis: focus on the science, NOT the learning objectives. This should be a prediction in the form of a clear, confident statement regarding what you would expect to happen in your experiment.

Pre‐Lab Questions

Most labs have pre‐lab questions associated with them.  copy the questions into your report and answer them in complete sentences, explaining your answers. The example questions shown at the end of this document also apply to the pre‐lab questions.

This section should briefly summarize what you did. NOTE: This section is where you want to place your photos for your lab.

Data: Clearly present your data. Include data tables and graphs . While graphs may not be needed for every lab, data tables usually are. If you list numbers, make sure units are either with all the numbers or make sure the column label includes the appropriate unit associated with all the numbers in that column.
Observations: Write in past tense. Here you summarize any observations hat you think are significant and could help you explain or support your results. The lab may or may not specifically direct you to make observations, however in either case you should include a few general observations from the experiment which are not directly reported in your data tables.