0654 · Cambridge IGCSE
0654/21
Multiple Choice (Extended)
Sciences Co ordinated Double · June 2024 · 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
Atoms, Elements and Compounds & Electricity and Magnetism
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 IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty.
It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calculations and the application of abstract scientific principles to unfamiliar scenarios.
The extended route expects students to demonstrate a deeper understanding of molecular structures, chemical thermodynamics, and kinematics.
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.
Recall of Scientific
Weight: 6100%Mathematical & Calculation
Weight: 467%Analysis & G
Weight: 350%Scientific Explanation
Weight: 233%
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
Show formula, substitution, and unit; method marks need visible working.
Give reasons and link mechanism to outcome; each point needs a because/so chain.
Match the expected response style for “State” questions.
State features in sequence or list observable properties — do not explain causes unless asked.
Match the expected response style for “Determine” questions.
Match the expected response style for “Construct” questions.
Apply knowledge to an unfamiliar context; concise, practical points score best.
Time traps
Sections where candidates spent disproportionate time relative to marks
No data available in official reports
Syllabus traceability
Topics linked to questions and mark weighting in this session
Atoms, elements and compounds
14 marks this session
Electricity and magnetism
14 marks this session
Motion, forces and energy
13 marks this session
Metals
12 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
Difficulty trend
How session difficulty has shifted across recent years
Paper comparison
Marks and duration breakdown across papers in this session
Paper 21 (Multiple Choice - Extended):
Paper 41 (Theory - Extended):
Paper 61 (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
Atoms, elements and compounds
14 marks this session
Practise in RevuiElectricity and magnetism
14 marks this session
Practise in RevuiMotion, forces and energy
13 marks this session
Practise in RevuiMetals
12 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty.
- 2Message
It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calculations and the application of abstract scientific principles to unfamiliar scenarios.
- 3Message
The extended route expects students to demonstrate a deeper understanding of molecular structures, chemical thermodynamics, and kinematics.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2024 2024
Sciences Co ordinated Double
The IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty. It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calcul
The IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty.
It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calculations and the application of abstract scientific principles to unfamiliar scenarios.
The extended route expects students to demonstrate a deeper understanding of molecular structures, chemical thermodynamics, and kinematics.
- Total marks
- 220
- Duration
- 255 min
- Session difficulty
- 3.8 / 5
Session analysis
The IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty. It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calculations and the application of abstract scientific principles to unfamiliar scenarios. The extended route expects students to demonstrate a deeper understanding of molecular structures, chemical thermodynamics, and kinematics.
Updated Jun 13, 2026
Paper breakdown
Paper 21 (Multiple Choice - Extended):
Paper 41 (Theory - Extended):
Paper 61 (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.
79% 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.
Short Answer & Recall
42·18·35%
Explanations & Descriptions
40·12·33%
Calculations & Data Processing
38·10·32%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Organic chemistry
85%85%
Coordination and response
80%80%
Thermal physics
75%75%
Paper Difficulty Verdict
The IGCSE Co-ordinated Sciences (0654/41) Theory Extended paper is rated a solid 3.8 out of 5 in terms of difficulty. It exhibits a highly balanced distribution across Biology, Chemistry, and Physics, demanding not only solid conceptual recall but also precise mathematical calculations and the application of abstract scientific principles to unfamiliar scenarios. The extended route expects students to demonstrate a deeper understanding of molecular structures, chemical thermodynamics, and kinematics.
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.