How does the refractive index of water, calculated using measured angles of refraction at an incident angle 30° (± 0.5°), vary with temperature between 5 °C and 55 °C (± 0.1 °C)?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 for collecting data
Good
A.3Methodological considerations
Good
Criteria Feedback
- The student places the investigation in a clear and scientifically appropriate context and shows why the question matters.
- The student's research question is specific and operationalised, with defined variables, a temperature range, and a clear measurement approach.
- The student's method includes important controls and a generally reproducible procedure.
- Some procedural details are still missing, so another reader could not fully replicate the setup without guessing.
- The design would be stronger if the student justified more clearly why the chosen temperature points and repeats were sufficient for the size of effect expected.
- Temperature stabilisation and exact alignment details need to be described more explicitly.
Criteria B: Data Analysis
5/6
0
3
6
Criteria StrandsPro
B.1Communication of data recording and processing
Excellent
B.2Consideration of uncertainties
Good
B.3Data processing quality
Good
Criteria Feedback
- The student's raw data presentation is organised and easy to follow, with repeats and uncertainties stated clearly.
- The student shows the processing steps transparently, including sample calculations and uncertainty propagation.
- The student's communication of the processed trend is generally clear and numerically precise.
- Some table headings and labels are imprecise, which makes parts of the processing harder to read at a glance.
- The uncertainty treatment is not always fully consistent or fully justified, especially when combining repeated measurements.
- A few calculations and summary values are not presented in the cleanest way, so independent checking is more difficult than it should be.
Criteria C: Conclusion
5/6
0
3
6
Criteria StrandsPro
C.1Conclusion relevance and support
Excellent
C.2Scientific context comparison
Excellent
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
5/6
0
3
6
Criteria StrandsPro
D.1Methodological weaknesses
Excellent
D.2Suggested improvements
Excellent
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.