AI Generated Exam Paper
Primary 6 PSLE Science Practice Paper 1
Free P6 PSLE Science Practice Paper 1, LongCat AI version, with questions, answers, and PSLE-focused practice for Singapore students.
These static practice materials are generated from the site's syllabus and paper-generation workflow, with source and model context shown so students and parents can evaluate the material before use.
Questions
Free quiz and exam paper access
Enter your details to view this paper
Your access is remembered on this device.
Answers
TuitionGoWhere Practice Paper — Science Primary 6 PSLE
Answer Key — Practice Paper 1 of 5 (Diversity)
Section A — Multiple Choice Questions (20 × 2 marks = 40 marks)
| Qn | Answer | Explanation |
|---|---|---|
| 1 | C | Living things are classified based on shared body structures and functions, not superficial traits like colour or size alone. |
| 2 | A | Organism P has feathers and lays eggs — key characteristics of birds. Q has scales (reptile/fish), R has scales but does not lay eggs (mammal), S has feathers but does not lay eggs (unlikely/not a typical bird). |
| 3 | C | A river is non-living. Mushrooms (fungi), coral (animals), and ferns (plants) are all living things. |
| 4 | C | The method of obtaining food (producer vs. consumer) is a key classification criterion for living things. |
| 5 | C | Grass is a flowering plant (angiosperm). Ferns and mosses reproduce by spores; pine trees are non-flowering seed plants (gymnosperms). |
| 6 | D | Amphibians are vertebrates (have a backbone). Insects, arachnids, and crustaceans are all invertebrates. |
| 7 | C | Group Z = no flowers + broad leaves. Group X = flowering; Group Y = non-flowering with needles. |
| 8 | C | A whale is a mammal — it breathes through lungs, is warm-blooded, and feeds its young with milk. Crocodiles, penguins, and snakes are not mammals. |
| 9 | C | Fungi lack chlorophyll and cannot photosynthesise, unlike green plants. |
| 10 | D | All living things can reproduce. Not all can fly, have legs, or photosynthesise. |
| 11 | B | Spiders have 8 legs; insects have 6 legs. Both have exoskeletons. |
| 12 | C | Ferns are non-flowering plants that reproduce by spores. Roses, sunflowers, and orchids are flowering plants. |
| 13 | D | Animal Z is cold-blooded, has no feathers or fur, and does not breathe through lungs — consistent with a fish (breathes through gills). |
| 14 | B | Classification helps scientists organise, study, and understand the vast diversity of life systematically. |
| 15 | C | Insects and worms are invertebrates (no backbone). All other options include vertebrates. |
| 16 | B | Amphibians have moist skin, no scales, and lay eggs in water. Reptiles have dry, scaly skin; fish have scales; mammals do not typically lay eggs in water. |
| 17 | C | The colour of flowers is not a reliable scientific classification criterion. Root systems, presence of flowers, and presence of seeds are valid criteria. |
| 18 | B | The ability to reproduce is a characteristic of all living things. Bacteria are microscopic, do not all cause diseases, and have no backbone. |
| 19 | B | A bat is a mammal — it has fur, is warm-blooded, and feeds its young with milk. Wings alone do not make something a bird. |
| 20 | B | A snake has a backbone (vertebrate) and is cold-blooded → Group B. |
Section B — Short-Answer Questions (10 × 3 marks = 30 marks)
21. State two characteristics that all mammals have in common. [2 marks]
| Mark | Answer |
|---|---|
| 1 | They have fur or hair on their bodies. |
| 1 | They feed their young with milk (from mammary glands). |
Accept also: They are warm-blooded / They breathe through lungs / They give birth to live young (except platypus and echidna).
22. Complete the table. [3 marks]
| Characteristic | Frog | Eagle | Shark |
|---|---|---|---|
| Body covering | Moist skin | Feathers | Scales |
| Reproduction | Egg | Egg | Egg (or Live young — accept either, as some sharks lay eggs and some give live birth) |
| Breathing organ | Lungs / Skin | Lungs | Gills |
Marking: 1 mark for each correct row entry (3 marks total).
23. Give one difference between a flowering plant and a non-flowering plant. [1 mark]
| Mark | Answer |
|---|---|
| 1 | Flowering plants produce flowers and seeds, while non-flowering plants reproduce by spores (or do not produce flowers). |
Accept: Flowering plants have flowers; non-flowering plants do not.
24. Explain why a whale is classified as a mammal and not a fish. Give two reasons. [2 marks]
| Mark | Answer |
|---|---|
| 1 | A whale breathes through lungs (not gills like a fish). |
| 1 | A whale is warm-blooded and feeds its young with milk (or gives birth to live young). |
Accept any two valid mammalian characteristics.
25. State two characteristics that scientists use to classify animals into vertebrates and invertebrates. [2 marks]
| Mark | Answer |
|---|---|
| 1 | Vertebrates have a backbone (spinal column); invertebrates do not have a backbone. |
| 1 | Vertebrates have an internal skeleton (endoskeleton); invertebrates may have an exoskeleton or no skeleton. |
Accept: Presence or absence of a backbone (1 mark); any other valid distinguishing feature (1 mark).
26. [2 marks]
(a) Fungi [1 mark]
(b) They do not contain chlorophyll / They cannot make their own food / They feed on decaying matter (decomposers). [1 mark]
27. What is Organism X? [1 mark]
Answer: Mollusc (or accept: snail, shellfish)
Reasoning: No backbone → has soft body → has shell = Mollusc.
28. State two differences between an insect and a spider. [2 marks]
| Feature | Insect | Spider |
|---|---|---|
| Number of legs | 6 | 8 |
| Body parts | 3 (head, thorax, abdomen) | 2 (cephalothorax, abdomen) |
Marking: 1 mark for each correct row (2 marks total).
29. Explain why it is important for scientists to classify living things into groups. [2 marks]
| Mark | Answer |
|---|---|
| 1 | It helps scientists organise and make sense of the huge variety of living things on Earth. |
| 1 | It makes it easier to study, identify, and understand the relationships between different organisms. |
Accept: It helps in communication between scientists / It helps identify new species / It shows evolutionary relationships.
30. Classify the organisms. [3 marks]
| Category | Organisms |
|---|---|
| Plants | (none listed — accept "none" or leave blank) |
| Animals | Grasshopper, earthworm, snail, bird |
| Fungi | Mushroom |
Marking: 1 mark for each correctly completed row. Note: None of the listed organisms are plants. If a student incorrectly places an organism, deduct accordingly.
Common mistake: Students may classify mushroom as a plant. This is incorrect — mushrooms are fungi.
Section C — Structured / Open-Ended Questions (5 × 6 marks = 30 marks)
31. [6 marks]
(a) [3 marks] — 1 mark for each correctly filled row (max 3 marks; 0.5 per organism if partial credit is applied, but for simplicity, 1 mark per row).
| Group | Organisms |
|---|---|
| Flowering plants | Orchid |
| Non-flowering plants | Fern, Moss |
| Vertebrates | Monitor lizard, Pigeon |
| Invertebrates | Dragonfly, Crab |
| Fungi | Mushroom |
Marking: Award 1 mark for each row with all correct organisms and no incorrect ones.
(b) [1 mark] — Accept any one valid difference:
- A dragonfly has wings / can fly; a crab does not have wings / cannot fly.
- A dragonfly has 6 legs; a crab has 10 legs (8 legs + 2 claws).
- A dragonfly undergoes metamorphosis; a crab does not (or undergoes different development).
- A dragonfly lives on land/in air; a crab lives in water/on land.
(c) [2 marks] — 1 mark per reason:
- Mushrooms do not contain chlorophyll and cannot make their own food by photosynthesis.
- Mushrooms feed on dead or decaying matter (they are decomposers/saprophytes), unlike green plants which are producers.
Accept: Mushrooms do not have roots, stems, or leaves like plants / Mushrooms reproduce by spores, not seeds.
32. [6 marks]
(a) [3 marks] — 1 mark for each correct identification (max 3 marks for all 5 correct).
- Animal A: Bird (feathers, warm-blooded, lungs, eggs)
- Animal B: Reptile (scales, cold-blooded, lungs, eggs)
- Animal C: Mammal (fur, warm-blooded, lungs, live young)
- Animal D: Fish (scales, cold-blooded, gills, eggs)
- Animal E: Amphibian (moist skin, cold-blooded, lungs and skin, eggs)
Marking: 1 mark per correct animal group. Award 3 marks if all 5 are correct; otherwise 1 mark each.
(b) [2 marks]
- Animal C is the mammal. [1 mark]
- It has fur, is warm-blooded, breathes through lungs, and gives birth to live young (does not lay eggs). [1 mark]
(c) [1 mark] — Accept any one characteristic shared by all five:
- They are all animals / living things.
- They all need food to survive.
- They all can reproduce.
- They all breathe (though using different organs).
33. [6 marks]
(a) [2 marks] — Butterfly:
- Cannot make its own food → Has backbone? No → Has 6 legs? Yes → Insect [1 mark for correct group, 1 mark for correct tracing/reasoning]
(b) [2 marks] — Cat:
- Cannot make its own food → Has backbone? Yes → Has feathers? No → Non-bird vertebrate [1 mark for correct group, 1 mark for correct tracing/reasoning]
(c) [2 marks]:
- The first step separates organisms into producers (can make their own food — plants) and consumers (cannot make their own food — animals, fungi). [1 mark]
- This is a fundamental division in the living world because it distinguishes organisms based on how they obtain their food/energy, which is one of the most important characteristics for classification. [1 mark]
34. [6 marks]
(a) [2 marks] — 1 mark per characteristic:
- (i) All birds have feathers.
- (ii) All birds lay eggs.
(b) [2 marks] — 1 mark per way:
- (i) Based on whether they produce flowers (flowering vs. non-flowering).
- (ii) Based on whether they produce seeds or spores.
(c) [2 marks]:
- The absence of a nucleus is a key characteristic that distinguishes bacteria from other organisms (like plants, animals, and fungi) that do have a nucleus in their cells. [1 mark]
- This helps scientists place bacteria into a separate group (prokaryotes) and understand their unique cellular structure and evolutionary position. [1 mark]
35. [6 marks]
(a) [2 marks] — An organism in the overlap (has feathers AND lays eggs):
- Answer: Any bird (e.g., pigeon, eagle, chicken, sparrow). [1 mark]
- Explanation: Birds have feathers and lay eggs, so they satisfy both conditions. [1 mark]
(b) [2 marks] — An organism in Group Q only (lays eggs but does NOT have feathers):
- Answer: Any reptile, amphibian, fish, insect, or monotreme (e.g., snake, frog, fish, butterfly, platypus). [1 mark]
- Explanation: These organisms lay eggs but do not have feathers (they may have scales, moist skin, exoskeleton, etc.). [1 mark]
(c) [2 marks]:
- Disagree. [1 mark]
- A bat does not have feathers — it has fur/skin membranes on its wings. Group P is defined by having feathers, not just having wings. A bat is a mammal, not a bird. [1 mark]
Common mistake: Students may confuse "wings" with "feathers." Emphasise that the defining characteristic of birds is feathers, not the ability to fly.
Mark Summary
| Section | Marks |
|---|---|
| A — MCQ (20 × 2) | 40 |
| B — Short Answer (10 questions) | 30 |
| C — Structured / Open-Ended (5 questions) | 30 |
| Total | 100 |
This practice paper was generated by TuitionGoWhere (AI) based on the MOE Primary Science syllabus for the topic of Diversity. It is designed for practice purposes and does not represent actual past-year PSLE questions.