Research question: How does the concentration of pectinase (Aspergillus aculeatus) solutions (0%, 20%, 40%, 60%, 80%) influence the volume (cm³) of Malus domestica juice collected after 5 minutes of filtration?SL
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7
Official IB Result
IB Grade: 7
Criteria A: Research Design
5/6
0
3
6
Criteria StrandsPro
A.1Research question context
Excellent
A.2Methodological considerations
Good
A.3Methodology description
Moderate
Criteria Feedback
- The student framed a focused research question in a clear biological and practical context.
- The student's method includes sensible controls and repeat trials, which supports a fair investigation.
- The student made a genuine effort to make the procedure reproducible with apparatus details, tables, and a preliminary trial.
- Some important variables were not fully standardized or justified, such as the enzyme stock, apple source/ripeness, and the exact crushing/mixing procedure.
- A few instructions are ambiguous or inconsistently referenced, which makes reproduction less secure.
- The concentration range is not fully justified as sufficient to answer the question.
Criteria B: Data Analysis
4/6
0
3
6
Criteria StrandsPro
B.1Communication of data recording and processing
Excellent
B.2Consideration of uncertainties
Moderate
B.3Data processing quality
Good
Criteria Feedback
- The student's raw data and processed tables are clearly organized and easy to follow.
- The student shows transparency in their calculations by including a worked example for the mean and standard deviation.
- The student presents the data graphically with labelled axes, units, and error bars, which helps communicate the trend clearly.
- There is a major uncertainty calculation error where the wrong apparatus uncertainty is used in the percentage-uncertainty example.
- The analysis does not always distinguish carefully between correlation and causation.
- The p-value is reported inaccurately as zero rather than below the software’s reporting precision.
Criteria C: Conclusion
3/6
0
3
6
Criteria StrandsPro
C.1Conclusion relevance and consistency
Good
C.2Scientific context comparison
Moderate
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Evaluation
3/6
0
3
6
Criteria StrandsPro
D.1Methodological weaknesses
Good
D.2Improvements
Good
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.