Plz help asap Phase Changes Lab Report Write a lab report for this lesson’s lab. Be sure that your report:
includes all major elements of a lab report.
meets your teacher’s content and format expectations.
is clearly organized and formatted.
demonstrates strong scientific reasoning and writing.
While writing, you can revisit previous parts of the lesson by returning to the course map. Be sure to refer
to the lab’s Student Guide, which you can access from a link in the lab activity. You may also find it
helpful to refer to the remaining pages of this guide, which provide general guidelines for writing lab
reports.
You can upload your completed report with the upload tool in formats such as OpenOffice. org,
Alternatively, your teacher may ask you to turn in a paper copy of your report
or to use a web-based writing tool.
Lab Report Checklist
Introduction
Did you title your lab report?
Did you state the purpose of the investigation?
Did you include a brief overview of the investigation?
Materials and Procedure
Did you make a list of materials? Did you include quantities and SI units?
Did you present the steps of the procedure as a numbered list?
Did you note any changes to the original procedure?

Data Collection and Organization
Did you organize all data in clearly labeled tables?
Did you check that your data are accurate and complete?
Analysis and Conclusion
Did you construct graphs if necessary?
Did you interpret your data and graphs in the analysis rather than just restate your findings?
Did you describe possible sources of error?
Did you suggest ways to improve or further your lab investigation?
Overall
Did you make sure that your writing is precise, unbiased, and concise?
Did you meet your teacher’s content and format expectations?
Overview
The Purpose of Lab Reports
When scientists make discoveries, they write reports to share their discoveries with the world. Likewise,
after you complete an investigation, you can write a report to share what you discovered.
Writing a lab report is an important skill because it helps you demonstrate what you learned in a science
investigation. It also helps you practice writing accurately and clearly about technical things—a skill that is
valuable in the real world.
This guide describes the format and style of lab reports. It has many tips that will help you write stronger
lab reports. Use it as a reference throughout your science studies.
Science Writing Style
Science writing is different from other styles of writing you may be familiar with, such as persuasive
writing and narrative writing. As with all types of writing, science writing has its own style; it is both precise
and objective.

Science writing is precise. Be concise, but use descriptive language and specific details to help readers
“see” what you observed. For example, a student who observes the presence of bubbles in a liquid during
an investigation may write “The liquid had bubbles.” This sentence is concise, but it does not tell the
reader what kind of bubbles the student saw. Two precise alternatives follow:
“The liquid had small bubbles—the size usually seen in soda.”
“The liquid produced bubbles the size of grapes or marbles.”
Science writing is objective. Avoid bias and subjective descriptions such as “The liquid had huge
bubbles.” Also, use the third-person voice and avoid personal pronouns such as I, we, you, he, she, and
they. This will allow readers to focus on the scientific topic without being distracted by thinking about the
person who did the work.
Part 1: Introduction
Title
Title your lab report.
Purpose
The lab report should begin with one or two sentences that state the purpose of the investigation—what
you want to see, practice, learn about, or test. The purpose statement answers the question “What am I
trying to find out by doing this investigation?”
The three most common types of labs are:
experimental labs, in which you measure how changing one variable affects another variable.
descriptive and comparative labs, in which you observe and/or compare scientific phenomena,
perhaps for the first time.
forensic labs, in which you gather and analyze data as evidence to build an argument in response to
a question, as in a court case.
All three types of labs give you an opportunity to learn important scientific skills and concepts.