To what extent does the presence of polyethylene (PE) microplastic influence the photo degradation kinetics of methylene blue in aqueous solutions under natural sunlight exposure, monitored using UV-Visible Spectrophotometry?HL
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B
Official IB Result
IB Grade: B
Criteria A: Focus and Method
4/6
0
3
6
Criteria Strands
A.1Topic communication and explanation
Good
A.2Research question formulation and focus
Good
A.3Research methodology
Poor
Criteria Feedback
- You communicate a clear environmental chemistry topic with a defined scientific purpose.
- You connect the investigation to relevant analytical techniques and give the reader a workable sense of what is being tested.
- Your report shows a generally sensible research structure and a purposeful experimental direction.
- The exposure condition is not used consistently throughout the title, question, and method.
- Some scientific wording is imprecise, especially where the discussion shifts from photodegradation to photocatalysis without enough justification.
- The method is not fully controlled for the central variables that would make the investigation conclusive.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria Strands
B.1Application of source material
Moderate
B.2Subject knowledge
Moderate
B.3Use of terminology and concepts
Moderate
Criteria Feedback
- You use relevant chemistry ideas such as Beer–Lambert law, calibration, absorbance, adsorption, and kinetic modelling.
- You show clear familiarity with terminology associated with spectrophotometry and reaction monitoring.
- Your background knowledge is generally coherent and connected to the investigation’s scientific context.
- Some claims go beyond what your data can directly support, especially where you describe PE as a catalyst or imply specific mechanisms without direct evidence.
- There are inconsistencies in how key equations and signs are written, which affects the clarity of the data interpretation.
- Some source material is applied too broadly to your system without enough qualification.
Criteria C: Critical Thinking
8/12
0
6
12
Criteria Strands
C.1Research quality
Poor
C.2Analysis depth
Poor
C.3Discussion and evaluation
Poor
Criteria Feedback
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Criteria D: Presentation
4/4
0
2
4
Criteria Strands
D.1Structure appropriateness
Good
D.2Layout considerations
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.