MYP Criterion B Lab report structure

Summary

This concise instructional video walks students through the structure of a lab report, with emphasis on Criteria B. It explains how to define the problem (linking independent and dependent variables), craft a supported if–then–because hypothesis, and list precise materials with quantities and safety gear. The presenter details how to identify independent, dependent, and control variables, design clear step-by-step procedures (avoid first-person), and set up a blank results table with units, multiple trials, and calculation of the mean. Practical tips—like specifying ranges, repeating trials for reliability, and saving full evaluation for Criteria C—help learners prepare accurate, scientific reports.

Takeaways

• 😀 Clearly define the problem in the lab report by identifying the dependent and independent variables and explaining their relevance with scientific evidence.
• 😀 Identify and differentiate between the three types of variables: independent (the one you change), dependent (the one you measure), and control (the ones you keep constant).
• 😀 When listing the independent variable, provide its range (e.g., temperatures used), while the dependent variable is the measurement (e.g., rate of reaction).
• 😀 The hypothesis should follow the structure of 'If [independent variable], then [dependent variable], because [scientific reasoning]'. Make sure it is supported with evidence from reliable sources.
• 😀 Ensure that the materials list is specific and includes exact quantities and measurements (e.g., 100 mL of water, 10 mL of hydrochloric acid) and safety equipment used.
• 😀 The procedure should be written as a clear, step-by-step plan without personal pronouns (e.g., ‘I did this’), focusing on how variables are measured and controlled.
• 😀 Repeating the experiment is crucial to ensure reliable results. Mention this in your method and record your findings multiple times.
• 😀 Always include a blank results table before starting the experiment, with space to record the independent and dependent variables along with their units.
• 😀 When recording results, conduct multiple trials and calculate the mean (not average) for more accurate data analysis.
• 😀 Ensure that units are included in the header of the results table. They do not need to be repeated in each row after that.
• 😀 The results table should be prepared in advance, outlining the layout for recording independent and dependent variables, including multiple trials for reliability.

Q & A

What key components make up the structure of a lab report according to the transcript?

The lab report should include defining the problem, hypothesis, variables, materials, procedure or methods, and a blank results table.

Which criteria of the lab report does the transcript focus on?

The transcript focuses on Criteria B, which includes defining the problem, hypothesis, variables, materials, methods, and a blank results table.

What is an independent variable and where is it placed on a graph?

The independent variable is the factor you change in the experiment, and it goes on the x-axis of the graph.

What is a dependent variable and where is it placed on a graph?

The dependent variable is the factor you measure in the experiment, and it goes on the y-axis of the graph.

What are control variables and why are they important?

Control variables are factors kept constant during the experiment to ensure a fair test. They prevent outside factors from affecting results.

How should the problem statement be written in a lab report?

The problem should be written in the form 'How is the dependent variable dependent on the independent variable?' and include scientific relevance and evidence.

What structure should a hypothesis follow?

A hypothesis should typically follow the structure 'If... then... because...', referencing both the independent and dependent variables and providing justification.

What is important to include in a materials list?

The materials list must include specific quantities and details of all equipment and chemicals used, including safety equipment.

How should the procedure be written?

The procedure should be written step-by-step, without using personal pronouns such as 'I' or 'we', and include details on how variables will be measured and controlled.

How should the results table be formatted before the experiment begins?

The results table should be prepared beforehand with the independent and dependent variables, units, multiple trials (at least three), and a column for calculating the mean (not labeled 'average').

Why is repeating the experiment important?

Repeating the experiment provides more reliable and scientifically valid results by allowing calculation of a mean and reducing the effects of anomalies.

What should be included to support the hypothesis?

The hypothesis should be supported with scientific evidence or researched information, properly referenced from reliable sources such as books or the internet.