Cambridge A Level Marine Science 9693 Past Papers 2026
Download free Cambridge AS & A Level Marine Science 9693 past papers, mark schemes, examiner reports & grade thresholds. 35 exam sessions from 2008–2026.
2025 Oct-Nov
Latest Session
35
Sessions
2008–2026
220
Question Papers
212
Mark Schemes
96% coverage
25
Examiner Reports
71% of sessions
30
Grade Thresholds
Components & time pressure
Marks per minute shows how fast you have to work — the higher the number, the tighter the time pressure in that paper.
| Paper | Component | Marks | Duration | Marks / min | Pressure |
|---|---|---|---|---|---|
| Paper 1 | AS Level Theory Paper | 75 | 1h 30m | 0.83 | Moderate |
| Paper 2 | AS Level Data-Handling and Investigative Skills | 75 | 1h 30m | 0.83 | Moderate |
| Paper 3 | A Level Theory Paper | 75 | 1h 30m | 0.83 | Moderate |
| Paper 4 | A Level Data-Handling and Investigative Skills | 75 | 2h | 0.63 | Steady |
Component structure extracted from 1 official Cambridge documents (2025). Timings and mark totals are taken from the papers themselves.
Yearly Exam Sessions
How is Cambridge AS & A Level Marine Science 9693 examined?
Cambridge AS & A Level Marine Science is examined through 4 paper components. Understanding each component helps you allocate revision time effectively.
Paper 1
75 marksAS Level Theory Paper
Duration: 1h 30m
Paper 2
75 marksAS Level Data-Handling and Investigative Skills
Duration: 1h 30m
Paper 3
75 marksA Level Theory Paper
Duration: 1h 30m
Paper 4
75 marksA Level Data-Handling and Investigative Skills
Duration: 2h
What Cambridge examiners say about Marine Science
Verbatim quotes from 1 official Cambridge examiner reports (2025). Every quote is attributable to a specific paper and session — these are the things Cambridge markers flag year after year.
Using the vague word 'amount' instead of mass
The use of the word 'amount' should be discouraged. Instead, candidates should consider what the 'amount' is – mass, volume, temperature, pressure, density, salinity, or concentration.
Writing in bullet points instead of continuous prose for…
It is expected that candidates write their answers in continuous prose for Section B questions, as stated in the specification. Those writing bullet points often could not be credited as the bullet points were not linked and consisted of a list of terms and short statements in a random and unclear sequence. This was particularly the case for 'explain' and 'discuss' questions, where the linking is essential for candidates to demonstrate they have a depth of understanding.
Giving own definitions instead of the precise…
There are a few definitions within the specification that candidates are expected to know and be able to precisely state what the terms mean. Salinity is one of those, defined as 'the concentration of dissolved salts in sea water'. However, few candidates were able to give the specification definition, often just stating 'the amount of salt' rather than using any scientific terminology in their definition.
Most Common Mistakes — Marine Science (9693)
Based on analysis of 1 official Cambridge examiner reports (2025). Avoid these errors to maximise your marks.
Using the vague word 'amount' instead of mass, volume, number or concentration
Paper 1, Paper 2, Paper 4 · Flagged across Papers 1, 2 and 4 — single most repeated language criticism
Writing in bullet points instead of continuous prose for Section B 'explain' and 'discuss' questions
Paper 1, Paper 3 · Flagged on every Paper 1 variant; specifically called out in Question 8(b)
Giving own definitions instead of the precise specification definitions
Paper 1, Paper 2, Paper 3 · Flagged for salinity, productivity, ion, tidal range — recurring across Papers 1, 2 and 3
Confusing pairs of similar marine science terms
Paper 1, Paper 3 · Repeatedly flagged across Papers 3 and 1
Saying energy is 'made', 'created' or 'lost' instead of released
Paper 3, Paper 4 · Flagged in Paper 3 mitochondria question
Topics Students Struggle With Most
Osmoregulation, osmoconformers and water potential
'Few candidates were then able to explain the relationship in terms of oysters being osmoconformers or having the same salinity as their surroundings. There was some confusion over the terms osmoconformers and osmoregulators.' Many candidates incorrectly stated water potential increases with sucrose concentration.
Paper 3, Paper 4
Mitochondria structure and aerobic respiration
'Few candidates referred to the size of a mitochondrion, the diffusion of gases, the permeability of the membranes or that the matrix contains enzymes... The term cisternae was commonly seen instead of cristae. The matrix was often referred to as cytoplasm.' Energy 'created' instead of 'released'.
Paper 3, Paper 4
Photosynthesis, chloroplasts and pigments
'Few responses referred to membrane permeability, to chloroplasts having a large surface area to volume ratio, to thin membranes so allowing easy diffusion of gases and water entry by osmosis... Although many candidates stated that green light was reflected, fewer included the absorption of red and blue light by chlorophyll.'
Paper 3, Paper 4
Salmon aquaculture and hatchery release
'Many of these candidates demonstrated minimal knowledge of A Level topics, particularly on osmoconformers, photosynthesis and salmon aquaculture... Disadvantages included the inability of hatchery produced adult salmon to adapt to ocean conditions.'
Paper 3
Specification definitions — salinity, productivity, ion, tidal range
Few candidates gave the specification definition of salinity. Many were unable to define 'ion'. 'Stronger candidates could clearly state the meaning of the term tidal range. Weaker responses often missed out height or difference.' Productivity definition needed reference to rate or time.
Paper 1, Paper 2, Paper 3
Practical methods — permeability, density, mark-release-recapture
'Candidates also found Question 4(c) where they were required to describe how to use the apparatus in the diagram to determine the permeability of sediment samples challenging... Few candidates gave a clear outline of how to carry out a mark-release-capture investigation with sufficient detail.'
Paper 2
Statistical tests — Spearman's rank and chi-squared
'Many candidates were able to complete and interpret the Spearman's rank correlation test, but some were unsure how to rank two data points with the same value... a few candidates were unsure whether the calculated value needed to be less or greater than the critical value.'
Paper 4
Carbon cycle, ocean acidification and food-web impacts
'If decomposition was mentioned, it was very rarely linked to marine snow sinking to the ocean floor... Some candidates confused increased pH with increased acidity. Candidates should refer to hydrogen ions rather than simply hydrogen.'
Paper 3, Paper 4
Marine Science (9693) — Cambridge AS & A Level Full Archive 2008–2026
This page contains all 487 available papers for Cambridge A Level Marine Science (9693) — 35 exam sessions from 2008 to 2026. Each session includes question papers, mark schemes, and where available, examiner reports and grade threshold documents. All files are free to download as PDF — no account required.
Cambridge A Level Marine Science (9693) is examined through multiple paper components. Question papers are available in two or three variants per session (v1, v2, v3) — each variant is sat in a different time zone but covers the same syllabus content and is equivalent in difficulty. The paper number in the filename indicates which component: for example, 9693_qp_12 is Paper 1, Variant 2.
Mark schemes for 9693 show the exact marking points accepted by Cambridge examiners. Many questions have multiple acceptable phrasings — look for 'accept', 'allow', and 'credit' in the mark scheme to understand the full range of valid responses. Examiner reports (where available) reveal the most common errors made by the cohort and what top-band answers looked like, making them essential reading before the actual exam.
The most effective way to use this archive is to attempt past papers under timed exam conditions, then analyse your mark scheme results by component. Track which paper components and question types you score lowest on — this tells you exactly where to focus revision. Grade threshold documents show the minimum mark needed for each grade in that specific session, which helps calibrate how your practice scores translate to actual grades.
Marine Science 9693 at other levels
Questions, answered.
You can download all Cambridge Marine Science 9693 past papers right here on PapersDaddy. We have 35 exam sessions from 2008–2026 — including question papers, mark schemes, examiner reports, and grade thresholds for 9693. Click any session below to view and download PDFs.
Yes! Every Cambridge AS & A Level Marine Science (9693) exam session includes the corresponding mark scheme alongside the question paper. Mark schemes show exactly how marks are allocated, helping you understand what examiners look for in top-scoring answers.
Start with recent 9693 papers (2025–2023) to understand current trends. Practice under timed conditions, then mark yourself using the mark scheme. Read examiner reports to learn common mistakes. For targeted revision, use Marine Science 9693 topical past papers to focus on specific topics.
We have Cambridge AS & A Level Marine Science (9693) papers from May/June, October/November, and March sessions (where applicable), covering 2008–2026. That's 35 exam sessions in total.