What topics are tested in PSLE science?

The PSLE Science exam tests the entire P3 to P6 syllabus. This covers five themes: Diversity (living and non-living things, classification), Cycles (life cycles, matter, water cycle), Systems (human body, plant systems, electrical circuits), Energy (light, heat, photosynthesis, energy conversion), and Interactions (food chains, food webs, forces, adaptations). P6 students must revise all topics from P3 to P5 in addition to new P6 content.

How many marks is PSLE science?

The PSLE Science paper is worth a total of 100 marks. Booklet A contains 30 multiple-choice questions worth 2 marks each (60 marks total). Booklet B contains 10 to 11 open-ended questions worth 2 to 5 marks each (40 marks total). The exam lasts 1 hour 45 minutes. MCQs make up 60% of the total marks, so strong MCQ performance is essential for a good score.

How many MCQs are in PSLE science?

There are 30 multiple-choice questions in PSLE Science Booklet A. Each MCQ is worth 2 marks, giving a total of 60 marks for the MCQ section. Students should aim to complete Booklet A within 45 minutes, which allows about 1 minute 30 seconds per question. There is no penalty for wrong answers, so students should never leave an MCQ blank.

What are the most commonly tested PSLE science topics?

Based on analysis of past PSLE papers, the most frequently tested topics include heat energy and temperature, food chains and food webs, forces (especially friction and gravity), electrical circuits, the water cycle, and plant reproduction. Cross-topic questions that combine concepts from different levels are also common — for example, questions linking photosynthesis to food chains, or energy conversion to forces.

How should I prepare for PSLE science in P6?

Start by ensuring you are confident in all P3 to P5 topics, since the PSLE tests the full syllabus. Create a revision schedule that revisits older topics weekly. For P6 topics, focus on application-based understanding rather than memorisation — practise explaining why things happen, not just what happens. Use timed MCQ practice to build speed and accuracy for Booklet A. For Booklet B, practise writing structured answers using correct scientific keywords.

P6 Science Questions — Free MCQ Practice & Revision with Answers

Primary 6 is the PSLE year — the most important year of primary school science. The PSLE exam tests the entire P3 to P6 syllabus, so P6 students must revise every topic they have learnt while also mastering new P6 concepts like food chains, food webs, forces, and adaptations. Practise with free MCQs below, with instant answers and detailed explanations for every option.

Use these free Primary 6 Science questions with answers as a quick diagnostic, then practise the weakest topics or build a weekly plan with our PSLE Science revision guide.

What Your Child Learns in P6

P6 is the PSLE year. The PSLE exam covers the entire primary science syllabus (P3 to P6), but the following topics are newly taught at P6: food chains, food webs, forces, adaptations, and energy conversion. Students also revisit photosynthesis at the Standard level.

The PSLE frequently combines concepts from different topics and levels in a single question. For example, photosynthesis (P5) may be tested alongside food chains (P6), or forces may appear in questions about energy conversion. This cross-topic approach means thorough revision of all levels is essential.

P6 Science Topics

Food Chains

Interactions

Students learn how energy flows from the Sun through living things in a food chain. They identify the roles of producers, consumers, predators, prey, and decomposers, and predict what happens when one population increases or decreases.

Practice Food Chains MCQ →

Food Webs

Interactions

Students learn how multiple food chains interconnect to form a food web and why food webs give a more realistic picture of feeding relationships. They trace the effects of population changes through multiple pathways.

Practice Food Webs MCQ →

Forces

Interactions

Students learn that a force is a push or a pull and explore its effects on objects. They study four types of forces — frictional force, gravitational force, elastic spring force, and magnetic force.

Practice Forces MCQ →

Adaptations

Interactions

Students learn how organisms survive in their habitat through structural adaptations (what an organism has, such as thick fur or camouflage) and behavioural adaptations (what an organism does, such as migration or hibernation).

Dedicated topic page coming soon

Energy Conversion

Energy

Students learn that energy exists in different forms — light, heat, sound, electrical, kinetic, and potential — and that energy can be converted from one form to another. They trace energy conversions in everyday devices.

Dedicated topic page coming soon

Photosynthesis

Energy

Students revisit photosynthesis at the Standard level, deepening their understanding of how green plants use sunlight, water, and carbon dioxide to make food. This topic connects directly to food chains as the starting point of all food chains.

Practice Photosynthesis MCQ →

PSLE Science Exam Format

The PSLE Science paper is 1 hour 45 minutes long and worth a total of 100 marks.

Booklet A — Multiple Choice Questions (MCQs)

30 MCQs, each worth 2 marks. Total: 60 marks (60% of the paper). Recommended time: 45 minutes.

Booklet B — Open-Ended Questions (OEQs)

10 to 11 questions worth 2 to 5 marks each. Total: 40 marks (40% of the paper). Recommended time: 50 minutes, with 10 minutes for checking.

The MCQs on this page mirror the format and difficulty of Booklet A questions. Practising MCQs with full explanations helps students build accuracy and speed for the actual exam.

Revision Topics from P4 and P5

The PSLE tests the entire P3 to P6 syllabus. P6 students should revise these frequently tested topics from earlier levels:

P4 Topics

Light, heat and temperature, matter, digestive system

→

P5 Topics

Electrical circuits, plant reproduction, water cycle, photosynthesis, human body systems

→

Practice Questions

Try these P6 science MCQs covering food chains, food webs, forces, and adaptations. Each question includes a detailed explanation of why every option is right or wrong — just like PSLE Booklet A.

Question 1

Study the food chain below. Grass → Grasshopper → Frog → Snake → Eagle A disease killed many of the frogs in the area. Which of the following describes the most likely effect on the other organisms?

Question 2

Ravi placed a toy car on a rough wooden plank and pushed it. He then placed the same toy car on a smooth glass surface and pushed it with the same amount of force. The toy car travelled a longer distance on the glass surface. Which of the following best explains why?

Question 3

Plants in a garden carry out photosynthesis to make food. Caterpillars eat the plants. Frogs eat the caterpillars. Which of the following correctly describes the energy pathway in this food chain?

Question 4

A polar bear has thick white fur and a layer of fat under its skin. It also hunts seals by waiting patiently at breathing holes in the ice for long periods. Which of the following correctly classifies the polar bear's adaptations?

Study Tips for P6 / PSLE Preparation

Revise P3-P5 topics alongside P6 content

The PSLE tests the entire P3 to P6 syllabus, not just P6 topics. Create a revision schedule that revisits one older topic each week while keeping up with new P6 work. Focus on frequently tested P4 topics like heat and temperature, light, and matter, as well as P5 topics like electrical circuits and the water cycle.

Practise Booklet A MCQs under timed conditions

In the PSLE, you have about 45 minutes for 30 MCQs — roughly 1 minute 30 seconds per question. Practice completing sets of MCQs within this time limit. If you are unsure of an answer, eliminate obviously wrong options first, then make your best choice and move on. Never leave an MCQ blank — there is no penalty for wrong answers.

Watch for cross-topic questions

The PSLE frequently combines concepts from different topics in a single question. Common cross-topic patterns include photosynthesis + food chains (energy flow from the Sun through producers to consumers), forces + energy conversion (elastic spring force converting to kinetic energy), and adaptations + food webs (how an adaptation helps an organism survive in its food web). Practise identifying which topics a question is testing.

Master population change reasoning for food chains and food webs

Population change questions are among the most commonly tested in PSLE Science. For food chains, trace the effect in both directions from the changed organism. For food webs, check whether predators have alternative food sources — if one food source decreases, they may eat more of another, creating unexpected effects. Always trace through every pathway before choosing your answer.

Use correct science language in your reasoning

Even for MCQs, understanding the correct scientific language helps you eliminate wrong options. Say 'a force acts on the object', not 'the object has force'. Say 'energy is converted from one form to another', not 'energy is used up'. Say 'the arrow shows the direction of energy flow', not 'the arrow shows what eats what'. Many wrong MCQ options are designed to catch students who use imprecise language.