Description

in this lab report I upload a lab submission (BIO120_LabEx06_Diffusion.pdf) you have to go to fourth part (IV. Osmosis and the rate (speed) of diffusion along aconcentration gradient) and read everything an understanding really well to do the lab report (YOU DO NOT HAVE TO ANSWER THE LAB SUBMISSION QUESTIONS). you have to understand these 3 questions to be able to do the lab report. ( YOU DO NOT HAVE TO ANSWER THE 3 QUESTIONS)

1. Carefully read and understand Osmosis and the rate (speed) of diffusion along a concentration gradient.

2. Read the procedure (pg 13) and reference Figure 2 (pg 11)

3. Write your answers to the following questions in your composition book:

      • What is this experiment evaluating?
      • How does the change in mass of the three model cells over time relate to osmosis?
      • How do you expect the mass to change for each of the model cells? (Increase? Decrease? No Change?) Explain why.

How to Write a Lab Report

Lab Reports Describe Your Experiment

Anne Marie Helmenstine, Ph.D.

Updated February 03, 2020

Lab reports are an essential part of all laboratory courses and usually a significant part of your grade. If your instructor gives you an outline for how to write a lab report, use that. Some instructors require a lab report to be included in a lab notebook, while others will request a separate report. Here’s a format for a lab report you can use if you aren’t sure what to write or need an explanation of what to include in the different parts of the report.

Lab Report

A lab report is how you explain what you did in your experiment, what you learned, and what the results meant.

Lab Report Essentials

Title Page

Not all lab reports have title pages, but if your instructor wants one, it would be a single page that states:

  • title of the experiment.
  • Your name and the names of any lab partners.
  • Your instructor’s name.
  • The date the lab was performed or the date the report was submitted.

Title

The title says what you did. It should be brief (aim for ten words or less) and describe the main point of the experiment or investigation. An example of a title would be: “Effects of Ultraviolet Light on Borax Crystal Growth Rate”. If you can, begin your title using a keyword rather than an article like “The” or “A”.

Introduction or Purpose

Usually, the introduction is one paragraph that explains the objectives or purpose of the lab. In one sentence, state the hypothesis. Sometimes an introduction may contain background information, briefly summarize how the experiment was performed, state the findings of the experiment, and list the conclusions of the investigation. Even if you don’t write a whole introduction, you need to state the purpose of the experiment, or why you did it. This would be where you state your hypothesis.

Materials

List everything needed to complete your experiment.

Methods

Describe the steps you completed during your investigation. This is your procedure. Be sufficiently detailed that anyone could read this section and duplicate your experiment. Write it as if you were giving direction for someone else to do the lab. It may be helpful to provide a figure to diagram your experimental setup.

Data

Numerical data obtained from your procedure usually presented as a table. Data encompasses what you recorded when you conducted the experiment. It’s just the facts, not any interpretation of what they mean.

Results

Describe in words what the data means. Sometimes the Results section is combined with the Discussion.

Discussion or Analysis

The Data section contains numbers; the Analysis section contains any calculations you made based on those numbers. This is where you interpret the data and determine whether or not a hypothesis was accepted. This is also where you would discuss any mistakes you might have made while conducting the investigation. You may wish to describe ways the study might have been improved.

Conclusions

Most of the time the conclusion is a single paragraph that sums up what happened in the experiment, whether your hypothesis was accepted or rejected, and what this means.

Figures and Graphs

Graphs and figures must both be labeled with a descriptive title. Label the axes on a graph, being sure to include units of measurement. The independent variable is on the X-axis, the dependent variable (the one you are measuring) is on the Y-axis. Be sure to refer to figures and graphs in the text of your report: the first figure is Figure 1, the second figure is Figure 2, etc.

References

If your research was based on someone else’s work or if you cited facts that require documentation, then you should list these references.

[How to Write a Lab Report] (Links to an external site.)

(PLEASE MAKE SURE TO ANSWER EACH PART OF THE LAB REPORT ESSENTIALS)


Diffusion and Osmosis Lab Report Guidelines

This lab report is going to focus mainly on part IV of the Diffusion and Osmosis lab: Osmosis and the rate (speed) of diffusion along a concentration gradient. This part of the lab required the collection of experiment data, so it is a good opportunity to to learn how to summarize and report of quantifiable results. Below, I have outline exactly what I would like you to do for this lab report. If you follow these guidelines to completion and you do not plagiarize, you will get full credit. As always, plagiarism will result in an assignment score of zero.

Diffusion and Osmosis Lab Report Guidelines

Title Page

Title of your Lab Report

Your Name

Professor’s Name

Introductory Image (Optional)

Introduction

Explain the concepts of osmosis and concentration gradients to a new reader. Be sure to define all terms that are critical to the reader’s understanding of diffusion rate when osmosis happens along differing concentration gradients. Discuss brownian motion and explain how it relates to diffusion and osmosis. Talk about selectively permeable membranes and use an explanation of aquaporins to show your understanding.

If you want, insert a figure here. Good figures to include would be a labeled drawing of an aquaporin protein, or of brownian motion. If you choose to include a figure, be sure to give it a title, captions, and/or labels wherever appropriate. Be sure to reference your figure in the text of your explanation as well.If you did the PreLab, you have already drawn this figure, so you just need to insert an image of it into your lab report.

Next, simply introduce the experiment and explain, in general terms, how it was used to demonstrate the processes you described in the previous paragraph.

Methods

You do not need to list all of the materials that were used for the experiment. In this section you just have to outlive the steps for each part of the experimental procedure so that the reader can understand the process and even repeat it themselves. You can use bullet points or even generate a flow chart on the computer or by hand. Whatever way you choose to convey the methods of this experiment has to be clear enough to show that you understand the methods.

Results

In this part of your lab report you include only an account of exactly what happened. This is the part where you can include any graphics or tables of data. Be sure to include a brief description of whatever your graphics show in a caption or in the text of your document. All graphics need to have a title. This is the part where you would include a table of the weight measurements for each bag at different times, or perhaps the plot you generated in lab.

Discussion & Conclusion

Explain to the reader how your results show the connection between the rate of diffusion and the concentration gradient. Provide an explanation for the results each experimental group. This is an opportunity to demonstrate your understanding of the topic as though you were explaining it to someone who has not done this experiment before.