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CXC · CSEC · Integrated Science

Free CXC CSEC Integrated Science
Practice Paper

8 mixed-difficulty practice questions in the style of real CXC CSEC papers — answers, mark-scheme-style explanations, and the official exam structure all on one page.

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What the real CXC CSEC Integrated Science paper looks like

Paper 1 (Section A)
60 multiple-choice questions, 1 mark each. 75 minutes. Tests knowledge across the whole syllabus.
Paper 2
Structured short-answer + 1 extended response question. Section A is compulsory; Section B has a choice. Approximately 2 hours 10 minutes.
School-Based Assessment (SBA)
Coursework component graded by the teacher, externally moderated. Worth ~20-30% of the final grade depending on subject.
Total exam time: ~3.5 hours across Paper 1 and Paper 2 sittings.
Grading: Grades: I (highest) to VI (lowest). A grade of III or above is typically required for further study.

Mini practice paper: 8 questions

Mixed-difficulty questions from across the Integrated Science syllabus. Tap "Show answer" after each to check yourself.

Q1 · Difficulty 1/3

A student in Trinidad investigated the effect of fertilizer on the growth of tomato plants. She recorded the height of plants in centimetres over six weeks. Which method of data presentation would be MOST appropriate to show how plant height changed over time?

  1. Pie chart
  2. Line graph
  3. Bar chart
  4. Pictogram
Show answer & explanation
✓ Answer: B — Line graph
Award 1 mark for identifying line graph as the appropriate method for showing continuous change over time. A is incorrect — pie charts show proportions of a whole, not change over time. C is incorrect — bar charts compare discrete categories, not continuous data. D is incorrect — pictograms are used for simple comparisons using symbols, not for showing trends.
Q2 · Difficulty 1/3

Which planet in the solar system is closest to the Sun?

  1. Venus
  2. Mercury
  3. Mars
  4. Earth
Show answer & explanation
✓ Answer: B — Mercury
Award 1 mark for correctly identifying Mercury as the innermost planet. A is incorrect — Venus is the second planet from the Sun. C is incorrect — Mars is the fourth planet. D is incorrect — Earth is the third planet from the Sun.
Q3 · Difficulty 1/3

In a Jamaican sugar factory, enzymes are used to speed up the breakdown of sucrose during processing. What term describes a substance that speeds up a chemical reaction without being used up?

  1. Reactant
  2. Product
  3. Catalyst
  4. Inhibitor
Show answer & explanation
✓ Answer: C — Catalyst
Award 1 mark for correctly identifying the term catalyst. A is incorrect — reactants are substances that undergo chemical change. B is incorrect — products are substances formed in a reaction. D is incorrect — inhibitors slow down or prevent reactions.
Q4 · Difficulty 1/3

What is the effect of improper waste disposal in the Caribbean?

  1. No effect
  2. Pollution of water sources, spread of disease, harm to marine life and ecosystems
  3. It improves soil quality
  4. It reduces flooding
Show answer & explanation
✓ Answer: B — Pollution of water sources, spread of disease, harm to marine life and ecosystems
Improper waste disposal contaminates rivers and the sea, clogs drains causing flooding, spreads disease via vectors like mosquitoes, and harms marine ecosystems like coral reefs.
Q5 · Difficulty 1/3

What is the function of the root system in plants?

  1. Photosynthesis
  2. Anchoring the plant and absorbing water and minerals from soil
  3. Producing flowers
  4. Releasing oxygen
Show answer & explanation
✓ Answer: B — Anchoring the plant and absorbing water and minerals from soil
Roots anchor plants in the soil and absorb water and dissolved minerals through root hair cells, which have a large surface area.
Q6 · Difficulty 1/3

Why is coral reef conservation important in the Caribbean?

  1. Coral reefs are not important
  2. Reefs protect coastlines, support biodiversity and fisheries, and attract tourism
  3. Reefs only matter for diving
  4. Reefs cause beach erosion
Show answer & explanation
✓ Answer: B — Reefs protect coastlines, support biodiversity and fisheries, and attract tourism
Caribbean coral reefs act as natural barriers against storms and erosion, support thousands of marine species, sustain fishing industries, and are vital for tourism.
Q7 · Difficulty 1/3

A farmer in Jamaica is crossing two heterozygous tall pea plants (Tt × Tt). What is the expected ratio of tall to short plants in the offspring?

  1. 1:1
  2. 2:1
  3. 3:1
  4. 4:0
Show answer & explanation
✓ Answer: C — 3:1
Award 1 mark for identifying the correct phenotypic ratio from a monohybrid cross between two heterozygous parents. The Punnett square gives TT, Tt, Tt, tt — three tall (TT, Tt, Tt) to one short (tt). A is incorrect — this ratio occurs when crossing Tt × tt. B is incorrect — this is not a standard Mendelian ratio. D is incorrect — this would occur only if both parents were homozygous dominant (TT × TT).
Q8 · Difficulty 1/3

What is the role of the skeletal system?

  1. Only to produce blood cells
  2. Support, protection of organs, movement (with muscles), and blood cell production
  3. Only to allow movement
  4. Only to store calcium
Show answer & explanation
✓ Answer: B — Support, protection of organs, movement (with muscles), and blood cell production
The skeletal system provides structural support, protects vital organs (skull→brain, ribs→lungs/heart), enables movement with muscles, and produces blood cells in bone marrow.
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CXC CSEC Integrated Science FAQ

What does the CXC CSEC Integrated Science exam look like?
The CXC CSEC Integrated Science exam is structured across 3 components. Paper 1 (Section A): 60 multiple-choice questions, 1 mark each. 75 minutes. Tests knowledge across the whole syllabus. Paper 2: Structured short-answer + 1 extended response question. Section A is compulsory; Section B has a choice. Approximately 2 hours 10 minutes. School-Based Assessment (SBA): Coursework component graded by the teacher, externally moderated. Worth ~20-30% of the final grade depending on subject. Total exam time: ~3.5 hours across Paper 1 and Paper 2 sittings.
Can I download a free CXC CSEC Integrated Science past paper?
Real CXC past papers are published directly by CXC on their official website. Kramizo doesn't redistribute copyrighted past papers, but we do generate free AI-written practice papers in the exact same style — same command words, same difficulty tier, same mark conventions. Use this practice paper as warm-up, then time yourself on official past papers before exam day.
How is CXC CSEC Integrated Science graded?
Grades: I (highest) to VI (lowest). A grade of III or above is typically required for further study. Kramizo's practice questions are tagged with difficulty 1-3 mapping roughly to the lower, middle, and top grade boundaries you'll encounter in the real exam.