The purpose of a lab report is to share what you learned in a formulaic manner. While there are occasional variations in what each section is called, the overall structure of a lab report in all science areas is relatively the same. As you continue in your study of science, you will find that lab reports may become more elaborate and complex. As this is the first one you have written this year, we will keep it simple. You may copy this and place it in our shared folder. Delete everything in red when you are finished working on your lab report.
Your lab report should represent organization, neatness and professionalism. This word-processed report is expected to be single spaced, using 12-point Times New Roman, Tahoma, or arial font.
Experimenting With Yeast Growth using Water and Ammonia
Introduction
Background
The purpose of this lab is to identify changes in cellular processes of yeast when in water vs. when in ammonia.
Cellular respiration is a process in which the cell converts oxygen into to carbon dioxide to produce energy to power the cell. This is how our yeast cells multiply when in water with sugar, as the sugar is used to power the cells to grow.
Experimental Design
If yeast is placed in water, will it then grow? If yeast is placed in ammonia, will it then grow.
Yeast in ammonia
Growth
Distance in centimeters
Yeast in water
Hypothesis
The hypothesis suggests an answer to the above experimental question. It is an educated, scientific guess taking into consideration the background information you researched, prior knowledge or evidence that you have.
You write a hypothesis in the if/then/because format. If…(independent variable), then…(dependent variable), because….a reason for your prediction. Ex: If different types of racquetballs are dropped, then they will bounce to different heights, because they are made of different materials.
Methodology and Procedure
This section can be in a narrative format or numbered format. A descriptive paragraph will suffice, simply tell the reader what you did in the experiment. Be sure to give amounts for solutions and describe the measurements collecte
Data and Results
This section contains a summary of your data in the form of graphs, tables, diagrams, calculations, etc. All of these should be labeled appropriately. This section is just for graphs, tables, and diagrams. Do not give interpretations, explanations, or inferences of your data as this belongs in the discussion section.
Written observations. Qualitative observations – descriptions such as sights, sounds, smells, etc. you have observed during your experiment. This can be written as a paragraph or bulleted sentences.
Graphs representing data. Quantitative observations – this could be any type of graph (bar, line, circle) you choose that represents your data properly. You may do this on the computer. Be sure to include a title, labeled axes, and proper data points. Also include a data table you make to organize and record measurements during your experiment. Some examples of information that might be recorded in data tables are frequencies, times and amounts.
Discussion and Analysis
The discussion is based on your actual results, whether they were expected or not. Explain the significance of your results. Were they what you predicted? Why or why not? How do your results relate to the “because” portion of your hypothesis?
Do NOT re-write your results.
This section is where you are to EXPLAIN YOUR RESULTS and what they mean. You should develop inferences based both on your experimental observations and on your prior knowledge of the topic. Your inferences must logically follow and be supported by your results. Discuss trends observed throughout your experiment.
Explain why certain data was important and decide if and how the data supported your hypothesis.
Discuss any weaknesses/problems in the experimental design. Identify sources of error.
Suggestions for improvement and design changes to remedy errors or weakness in the design.
This section is where you state whether or not the data supported the hypothesis. Ex: The data collected did not support the hypothesis. (Do not use the word “my” in this sentence.)
Talk about significant results, and explain how your data fits into the body of knowledge on the topic. Avoid indicating a definite cause-and-effect relationship.
Identify limitations. There are always factors outside of your control that influence your results. It’s important to identify these factors before, during, and after the investigation.
Generate new questions. A good experiment raises as many or more questions than it answers. List further questions that you have and suggestions for further research.
Works Cited
It is extremely important that you cite any and all sources that you use for your experiment. This includes any graphics that you use. Refer to the MLA Citation Guide in the Writing Handbook for proper format. You may skip this section if the only materials used were instructions given by your teacher (verbal or written).
The purpose of a lab report is to share what you learned in a formulaic manner. While there are occasional variations in what each section is called, the overall structure of a lab report in all science areas is relatively the same. As you continue in your study of science, you will find that lab reports may become more elaborate and complex. As this is the first one you have written this year, we will keep it simple. You may copy this and place it in our shared folder. Delete everything in red when you are finished working on your lab report.
Your lab report should represent organization, neatness and professionalism. This word-processed report is expected to be single spaced, using 12-point Times New Roman, Tahoma, or arial font.
Experimenting With Yeast Growth using Water and Ammonia
Introduction
Methodology and Procedure
Data and Results
Discussion and Analysis
Works Cited