View IB Marine Science grade boundaries over time for SL. Understand score trends and how marks convert into final IB grades.
Grade boundaries explain how raw exam marks are converted into final IB grades from 1 to 7 and are adjusted each session to reflect exam difficulty and global student performance.
| Component | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Paper 1 | 0-6 | 7-12 | 13-17 | 18-22 | 23-28 | 29-33 | 34-50 |
| Paper 2 | 0-5 | 6-11 | 12-18 | 19-22 | 23-25 | 26-29 | 30-50 |
| Internal Assessment | 0-3 | 4-6 | 7-10 | 11-13 | 14-16 | 17-19 | 20-24 |
| Final Grade (%) | 0-11 | 12-23 | 24-36 | 37-46 | 47-56 | 57-65 | 66-100 |
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