P5 Science Cheatsheet — What the NYPS Papers Actually Test
Built from 8 years of Nanyang Primary P5 Science papers (2018–2025) | Created by Miss Clarissa Ng | www.clartutors.com
TEACH How to Use This Sheet — Teach This First
Suggested flow: walk through these points with your student first (this is the lesson), then let them attempt past-paper questions, and finish by going back over the topic cards below as a conclusion. Every frequency claim on this sheet comes from counting all 320 questions across the eight NYPS papers.
1The paper has four pillars — they appear in every single year of this window. Electricity & circuits, human body systems (digestive + circulatory/respiratory), plant reproduction & dispersal, and animal life cycles. A student who is solid on these four topics can answer the guaranteed questions no matter what else changes.
2Electricity is the single biggest topic — about a quarter of all questions across eight years. Expect a block of consecutive MCQs on circuits in the middle of Booklet A, and the final structured question is almost always electricity or magnets. If time runs short in revision, this is where to spend it first.
3States of matter is the rising topic — weight it up. It went from about 2 questions per paper in 2018 to 6–7 by 2022 and 2025. Changes of state, evaporation factors and reading temperature–time graphs are the recurring formats.
4Forces & motion has faded — do not over-drill it. It was a solid MCQ block in 2018–2019, then essentially disappeared for the rest of the window. Keep basic force/friction vocabulary, but redirect that revision time to electricity and states of matter where the yield is higher.
5The mark-earning habit: give cause → effect, not just a label. Name the process (conduction, evaporation, condensation, germination) AND explain what happens to the object. One complete sentence with both parts usually earns full marks where a bare keyword does not.
Paper format: 2018–2024 were always 28 MCQs (56 marks) + 12 structured questions (44 marks). The 2025 paper shifted to 30 MCQs (60 marks) + 10 structured (40 marks) — so prepare for either shape; the topics, not the counts, are what stay stable.
1 · PILLAR Electricity & Circuits — the dominant topic
Circuits: making current flow
- A circuit only works when it is CLOSED — a complete path from one terminal of the cell back to the other through the wires and components
- Batteries in series must connect POSITIVE-to-NEGATIVE; a reversed battery breaks the flow, so a dark bulb with working parts usually means one cell is flipped
- To count bulbs that light: trace the wire from one terminal to the other — every bulb ON that closed loop lights. Follow the wire, not the number of bulbs drawn
Conductors & insulators
- CONDUCTORS let current pass (metals: copper, iron, aluminium); INSULATORS block it (rubber, plastic, wood, glass)
- A bulb only lights if the whole path is conducting — one insulator in the loop and nothing works
Electromagnets
- An electromagnet = a coil of wire around an iron core with current flowing through it. It attracts magnetic materials ONLY while the circuit is closed — switch off and the magnetism stops
- Stronger when: more turns on the coil, or more cells in series (more current)
Where it sits in the paper: a block of consecutive MCQs usually lands in the middle of Booklet A, and the LAST structured question is almost always electricity or magnets. Practise tracing circuits under time pressure — it is the most reliable marks on the paper.
2 · PILLAR Human Body Systems — guaranteed structured question every year
Digestive system (the most common structured topic)
- Path: mouth → oesophagus → stomach → small intestine → large intestine → anus. Know each part's JOB, not just its name
- Mouth: teeth grind food, saliva moistens it (mechanical + chemical digestion begins). Stomach: churning mixes food with gastric juice — digests proteins
- Small intestine: DIGESTION FINISHES and ABSORPTION happens here into the blood. Large intestine: absorbs WATER from undigested food, forms faeces
Circulatory system (the other recurring structured topic)
- The heart is a MUSCLE that pumps blood; it has four chambers — two atria on top, two ventricles below. Valves stop blood flowing backwards
- ARTERIES carry blood AWAY from the heart (thick walls, high pressure); VEINS carry blood back to the heart; CAPILLARIES are where oxygen and food pass into tissues
- Blood carries: oxygen, digested food, waste to be removed, and antibodies against disease
Respiratory system (often paired with circulatory)
- Air path: nose → trachea → bronchi → lungs. Gas exchange happens in the ALVEOLI — oxygen passes into the blood, carbon dioxide out
- The diaphragm contracts and flattens to draw air IN; it relaxes to push air OUT
Answer format: these structured questions ask you to label a diagram AND explain a function. Write the full cause → effect: 'The small intestine absorbs digested food into the blood because its walls are thin and have villi' — not just 'absorption'.
3 · PILLAR Plants: Reproduction & Dispersal — guaranteed structured every year
Seed dispersal methods (know the adaptation for each)
- WIND: light seeds with wings or parachutes (dandelion, maple) — carried far by air currents
- WATER: buoyant seeds with a waterproof coating (coconut) — float to new land
- ANIMALS: hooks/barbs cling to fur (burrs), or fleshy sweet fruits get eaten and the seed passes through undamaged
- SELF-EXPLOSION: pods split open with force when dry (touch-me-not) — seeds shoot out
Germination & growth
- A seed germinates only with the right conditions: WATER, OXYGEN and a SUITABLE TEMPERATURE. (Light is NOT needed for most seeds to start growing)
- The EMBRYO grows into the seedling — first the root goes down, then the shoot up
- In growth experiments, identify the ONE variable being tested and name what must be kept constant for a fair test
The classic trap: students write 'light' as a germination condition. The three conditions are water, oxygen and suitable temperature — light matters later (for the shoot to make food), not for the seed to start growing.
4 · PILLAR Animals: Life Cycles — guaranteed structured every year
The cycles that recur
- BUTTERFLY & DRAGONFLY (complete metamorphosis): egg → larva/caterpillar → pupa/chrysalis → adult. The larva eats a lot to store food for the change inside the pupa
- FROG: egg → tadpole (breathes with GILLS, lives in water) → froglet → adult (breathes with LUNGS). Tadpoles have tails and no legs; adults lose the tail
- BIRD: egg → chick (hatches downy) → grows feathers → adult. The embryo develops inside the egg using the yolk for food
How to answer life-cycle questions
- Order the stages correctly and name EACH one — a missing stage loses marks even if the rest is right
- 'What changes between X and Y?' = describe body parts (legs, tail, gills vs lungs) AND habitat (water vs land)
Quick check habit: for any life cycle, ask 'where does it live at this stage and how does it breathe?' — those two details are what structured questions mark.
5 · RISING Matter: States & Changes of State — the topic that keeps growing
The three states (state all three properties)
- SOLID: fixed shape AND fixed volume. LIQUID: takes the shape of its container, fixed volume. GAS: expands to fill its whole container, no fixed shape or volume
Changes of state — definitions in one line each
- MELTING: solid → liquid (at the melting point). FREEZING: liquid → solid. BOILING: liquid → gas at its boiling point, bubbles form throughout. CONDENSATION: gas → liquid
- EVAPORATION: liquid → gas BELOW the boiling point, only at the surface — it happens even when water is not hot (wet clothes dry on a line)
Reading temperature–time graphs
- The FLAT part of the line = a change of state happening: heat is being gained or lost but the temperature stays put until the whole sample has changed
- Evaporation speeds up with MORE HEAT, a LARGER exposed surface area, and more AIR FLOW — rank samples by these three factors when asked which dries fastest
Trend note: this topic roughly tripled across the window (about 2 questions per paper in 2018 → 6–7 by 2025). It is the safest 'extra' topic to drill beyond the four pillars.
6 Heat — Conduction, Expansion & Insulation
- Heat flows from HOT to COLD. CONDUCTION is heat passing through a material by contact — METALS are good conductors, AIR and wood are poor conductors (insulators)
- To keep something HOT: wrap it in an insulator (a double-walled bottle with air between the walls keeps coffee hot because air conducts poorly). To keep something COLD: same idea — insulation slows heat IN as well
- Solids EXPAND when heated and CONTRACT when cooled. Fit a tight metal rim by HEATING THE RIM so it expands, slips on, then contracts to grip; leave slack in overhead wires so they do not snap as they cool at night
The classic trap: heat the part that must GET BIGGER (the rim), never the part it fits onto. And a poor conductor still gets scorched over time if it sits above a flame long enough — 'poor' is not 'none'.
7 Water Cycle, Weather & Conservation
- The cycle: EVAPORATION (sun heats oceans/rivers → water vapour) → CONDENSATION (vapour cools high up → tiny droplets form clouds) → PRECIPITATION (rain/snow falls) → COLLECTION (water gathers in seas and rivers, then repeats)
- WEATHER = short-term conditions on a particular day; CLIMATE = the average weather over many years. Do not swap these words
- Water pollution harms aquatic life — name ONE source (sewage, chemicals, litter) and its effect when asked. Conservation answers: reduce waste, reuse water, fix leaks
Newer addition: pollution/conservation questions started appearing from 2022, usually paired with a water-cycle MCQ — keep one clean example of each ready.
8 Light & Magnets — smaller but steady topics
Light (intermittent — appears in some years, ~2 questions when it does)
- Light travels in STRAIGHT LINES. A shadow forms where an opaque object blocks light; the shadow gets BIGGER when the object is CLOSER to the light or the screen is FURTHER away
- LIGHT SOURCES give out their own light (sun, lamp); other objects are seen because they REFLECT light into our eyes. A mirror reflects at equal angles — angle of incidence = angle of reflection
Magnets (often the final structured question)
- Like poles REPUL, opposite poles ATTRACT. Only magnetic materials are affected: iron, steel, nickel, cobalt — aluminium and copper are NOT
- REPULSION is the only sure test that two objects are both magnets (a magnet also attracts unmagnetised iron). Magnetism can be induced by rubbing with a magnet or by electric current (electromagnet)
Keep it light: these two topics together account for a small share of the paper. One solid pass through each is enough — do not let them crowd out the four pillars.
9 Cell Structure — appears in about half the years
- BOTH plant and animal cells have: a CELL MEMBRANE (controls what enters/leaves), CYTOPLASM (where reactions happen) and a NUCLEUS (controls cell activities)
- Plant cells ADDITIONALLY have: a rigid CELL WALL (support and shape), CHLOROPLASTS (contain chlorophyll for photosynthesis) and a large VACUOLE
- 'Which part does X?' — support = cell wall; food-making = chloroplasts; control = nucleus; boundary = membrane. One function per structure, no mixing
Format: when it appears, it is usually a structured question with a labelled diagram — practise naming parts AND stating each part's job in one sentence.
🧠 Chapter Concept Map