0654 · Cambridge IGCSE
0654/21
Multiple Choice (Extended)
Sciences Co ordinated Double · June 2025 · Variant 1
Relative difficulty
Analysis source: Cambridge Assessment International Education
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
220
255 min
Motion, forces and energy
Cohort performance
Session statistics from official examination reports
Total marks
220
Duration
255 min
Session difficulty
3.8 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics.
With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is assessed at a solid 4 stars out of 5.
While the Core papers provide a gentler ramp-on for foundational knowledge, the Extended papers push deeply into quantitative chemical calculations, physiological processes, and advanced mechanics.
The inclusion of Space Physics and Star Life Cycles adds a conceptually fascinating but demanding dimension to the Physics section.
Question difficulty map
How candidates performed on each question in this series
No data available in official reports
Assessment objectives
Skill and AO weighting from official examiner commentary
Skill weighting
Shows the skill mix this paper tested most heavily.
Quantitative & Diagrammatic Skills
Weight: 6100%Graphical Interpretation
Weight: 583%Theoretical Recitation
Weight: 350%Experimental
Weight: 117%
Method marks watchlist
Where working, steps, or method marks were commonly lost
No data available in official reports
Recurring mistakes across years
Themes examiners flag in multiple recent sessions for this subject
No data available in official reports
Question choice intelligence
Mean scores and popularity for optional questions (HKDSE electives)
No data available in official reports
Level exemplars
What candidate scripts at each grade level looked like
No data available in official reports
Grade & admission context
How marks relate to grade thresholds and entry standards
Report type
Cambridge Principal Examiner Report — component performance and international standards
Level A*
Approx. 74% of maximum mark
Level A
Approx. 62% of maximum mark
Level B
Approx. 50% of maximum mark
Level C
Approx. 38% of maximum mark
Level D
Approx. 33% of maximum mark
Level E
Approx. 28% of maximum mark
Deep insights
What top candidates did
Techniques and approaches examiners rewarded in this series
No data available in official reports
Command word playbook
How to match each command word to the expected response style
Give reasons and link mechanism to outcome; each point needs a because/so chain.
State features in sequence or list observable properties — do not explain causes unless asked.
Show formula, substitution, and unit; method marks need visible working.
Match the expected response style for “State” questions.
Match the expected response style for “Determine” questions.
Match the expected response style for “Show” questions.
Apply knowledge to an unfamiliar context; concise, practical points score best.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.1
Min per mark: 1
Min per mark: 1
Min per mark: 1
Syllabus traceability
Topics linked to questions and mark weighting in this session
Motion, forces and energy
18 marks this session
Acids, bases and salts
12 marks this session
Electricity and magnetism
12 marks this session
Experimental techniques and chemical analysis
11 marks this session
MCQ trap analytics
Commonly chosen wrong options from examiner commentary
No data available in official reports
Topic heatmap across years
Mark concentration by topic and exam year for this subject
Mark intensity
Motion, forces and energy
Electricity and magnetism
Atoms, elements and compounds
Acids, bases and salts
Metals
Experimental techniques and chemical analysis
Paper comparison
Marks and duration breakdown across papers in this session
Paper 2 Multiple Choice (Extended):
Paper 4 Theory (Extended):
Paper 6 Alternative to Practical:
Marks you can still earn
Where valid approaches outside the mark scheme may still gain credit
No data available in official reports
Practise what examiners flagged
Target weak topics from this report inside the Revui app
Motion, forces and energy
18 marks this session
Practise in RevuiAcids, bases and salts
12 marks this session
Practise in RevuiElectricity and magnetism
12 marks this session
Practise in RevuiExperimental techniques and chemical analysis
11 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics.
- 2Message
With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is assessed at a solid 4 stars out of 5.
- 3Message
While the Core papers provide a gentler ramp-on for foundational knowledge, the Extended papers push deeply into quantitative chemical calculations, physiological processes, and advanced mechanics.
- 4Message
The inclusion of Space Physics and Star Life Cycles adds a conceptually fascinating but demanding dimension to the Physics section.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2025 2025
Sciences Co ordinated Double
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics. With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics.
With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is assessed at a solid 4 stars out of 5.
While the Core papers provide a gentler ramp-on for foundational knowledge, the Extended papers push deeply into quantitative chemical calculations, physiological processes, and advanced mechanics.
- Total marks
- 220
- Duration
- 255 min
- Session difficulty
- 3.8 / 5
Session analysis
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics. With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is assessed at a solid 4 stars out of 5. While the Core papers provide a gentler ramp-on for foundational knowledge, the Extended papers push deeply into quantitative chemical calculations, physiological processes, and advanced mechanics. The inclusion of Space Physics and Star Life Cycles adds a conceptually fascinating but demanding dimension to the Physics section.
Updated Jun 13, 2026
Paper breakdown
Paper 2 Multiple Choice (Extended):
Paper 4 Theory (Extended):
Paper 6 Alternative to Practical:
Top chapters
Exam structure insights
Marks by chapter
See where the marks were concentrated so revision time goes to the highest-value topics.
Mark accessibility
Estimate which marks were basic, mid-level, or high-difficulty.
80% within easy or medium reach
Command word frequency
Spot common command words so answers match the expected response style.
Question type mix
Compare the mark share of each paper section and question type.
Structured Theory
120·12·55%
Practical/Alternative to Practical
60·6·27%
Multiple Choice
40·40·18%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Difficulty trend
Compare difficulty across recent years.
Time vs marks
Compare marks with suggested time allocation to plan exam pacing.
Paper 2 (Multiple C
0.89 m/minPaper 4 (Theory - B
1.00 m/minPaper 4 (Theory - C
1.00 m/minPaper 4 (Theory - P
1.00 m/minTotal marks
160
Total time
165 min
Avg pace
0.97
Cumulative marks ladder
The line is your running mark total question by question; dashed lines are the estimated grade cut-offs. See which question the line crosses your target grade at, so you know how far you must answer cleanly and which questions decide a band.
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Organic chemistry - Alcohols and Carboxylic Acids
90%90%
Reproduction in plants and humans
85%85%
Nuclear physics and radioactivity
80%80%
Extended Pathway Difficulty Verdict
The Cambridge IGCSE Co-ordinated Sciences (Double Award) 0654 exam represents a challenging test of students' ability to transition smoothly across the boundaries of Biology, Chemistry, and Physics. With a total of 220 marks spanning Papers 2, 4, and 6, the overall difficulty is assessed at a solid 4 stars out of 5. While the Core papers provide a gentler ramp-on for foundational knowledge, the Extended papers push deeply into quantitative chemical calculations, physiological processes, and advanced mechanics. The inclusion of Space Physics and Star Life Cycles adds a conceptually fascinating but demanding dimension to the Physics section.
Exam tips
Paper format
- Duration
- 45min
- Total marks
- 40
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.