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Primary 6 PSLE Science Practice Paper 1

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TuitionGoWhere Practice Paper - Science Primary 6 PSLE

TuitionGoWhere Practice Paper (AI)

Subject: Science Level: Primary 6 PSLE Paper: Practice Paper 1 of 5 — Diversity Duration: 1 hour 45 minutes Total Marks: 100

Name: ____________________________ Class: ____________________________ Date: ____________________________

Instructions

This paper consists of three sections: Section A, Section B, and Section C.
Section A — 20 Multiple Choice Questions (2 marks each) = 40 marks
Section B — 10 Short-Answer Questions = 30 marks
Section C — 5 Structured / Open-Ended Questions = 30 marks
Answer all questions.
Write your answers in the spaces provided.
For Section A, shade the correct option on the answer sheet provided.
The use of calculators is not permitted.
You are advised to spend about:
- 30 minutes on Section A
- 40 minutes on Section B
- 30 minutes on Section C
- Remaining time for checking

Section A — Multiple Choice Questions (20 × 2 marks = 40 marks)

Each question is followed by four options, (A), (B), (C), and (D). For each question, choose one most accurate answer.

1. Which of the following is a characteristic used to classify living things into groups?

(A) Colour of the organism (B) Number of legs only (C) Similarities in body structures and functions (D) Size of the organism

______________________________________________________________________________________________

2. The table below shows four organisms and their characteristics.

Organism	Has feathers	Has scales	Lays eggs
P	Yes	No	Yes
Q	No	Yes	Yes
R	No	Yes	No
S	Yes	No	No

Which organism is most likely a bird?

(A) P (B) Q (C) R (D) S

______________________________________________________________________________________________

3. Which of the following is a non-living thing?

(A) Mushroom (B) Coral (C) River (D) Fern

______________________________________________________________________________________________

4. A student grouped a set of organisms based on whether they could produce their own food. Which characteristic was the student using?

(A) How the organisms move (B) How the organisms reproduce (C) How the organisms obtain food (D) Where the organisms live

______________________________________________________________________________________________

5. Which of the following is a flowering plant?

(A) Fern (B) Moss (C) Grass (D) Pine tree

______________________________________________________________________________________________

6. Which group of animals has a backbone?

(A) Insects (B) Arachnids (C) Crustaceans (D) Amphibians

______________________________________________________________________________________________

7. The diagram below shows a classification key.

Living Thing
├── Has flowers ────────── Group X
└── No flowers
    ├── Has needles ────── Group Y
    └── Has broad leaves ── Group Z

Which group contains plants that are non-flowering with broad leaves?

(A) Group X (B) Group Y (C) Group Z (D) None of the above

______________________________________________________________________________________________

8. Which of the following organisms is a mammal?

(A) Crocodile (B) Penguin (C) Whale (D) Snake

______________________________________________________________________________________________

9. Fungi are different from green plants because fungi

(A) can make their own food. (B) do not have roots. (C) do not contain chlorophyll. (D) reproduce by seeds.

______________________________________________________________________________________________

10. Which of the following is a characteristic of all living things?

(A) They can fly. (B) They have legs. (C) They can photosynthesise. (D) They can reproduce.

______________________________________________________________________________________________

11. A spider is different from an insect because a spider

(A) has six legs. (B) has eight legs. (C) has wings. (D) has an exoskeleton.

______________________________________________________________________________________________

12. Which of the following is an example of a non-flowering plant that reproduces by spores?

(A) Rose plant (B) Sunflower (C) Fern (D) Orchid

______________________________________________________________________________________________

13. The table below shows the characteristics of four animals.

Animal	Warm-blooded	Has feathers	Has fur	Breathes through lungs
W	Yes	Yes	No	Yes
X	Yes	No	Yes	Yes
Y	No	No	No	Yes
Z	No	No	No	No

Which animal is most likely a fish?

(A) W (B) X (C) Y (D) Z

______________________________________________________________________________________________

14. Which of the following is the best reason why scientists classify living things?

(A) To give every organism a unique name (B) To make it easier to study and understand the diversity of life (C) To count the number of organisms on Earth (D) To decide which organisms are useful to humans

______________________________________________________________________________________________

15. Which of the following groups of organisms are invertebrates?

(A) Birds and mammals (B) Fish and amphibians (C) Insects and worms (D) Reptiles and birds

______________________________________________________________________________________________

16. A student found an organism near a pond. It had a moist skin, no scales, and laid eggs in water. This organism most likely belongs to which group?

(A) Reptiles (B) Amphibians (C) Fish (D) Mammals

______________________________________________________________________________________________

17. Which of the following is not a characteristic used to classify plants?

(A) Presence or absence of flowers (B) Type of root system (C) Colour of the flowers (D) Presence or absence of seeds

______________________________________________________________________________________________

18. Bacteria are classified as living things. Which characteristic confirms this?

(A) They are visible to the naked eye. (B) They can reproduce. (C) They all cause diseases. (D) They have a backbone.

______________________________________________________________________________________________

19. Which of the following correctly shows the classification of a bat?

(A) Bird — it has wings and can fly (B) Mammal — it has fur and feeds its young with milk (C) Reptile — it is warm-blooded and has wings (D) Insect — it is small and can fly

______________________________________________________________________________________________

20. The diagram below shows a simple classification key for four organisms.

Organism
├── Has backbone ──────────────────── Vertebrate
│   ├── Warm-blooded ──────────── Group A
│   └── Cold-blooded ───────────── Group B
└── No backbone ──────────────────── Invertebrate
    ├── Has jointed legs ──────── Group C
    └── No jointed legs ────────── Group D

A snake would fall into which group?

(A) Group A (B) Group B (C) Group C (D) Group D

______________________________________________________________________________________________

Section B — Short-Answer Questions (10 × 3 marks = 30 marks)

Answer each question in the space provided. Write your answers clearly and in complete sentences where required.

21. State two characteristics that all mammals have in common.

(a) _____________________________________________________________________________________________

(b) _____________________________________________________________________________________________

[2 marks]

22. The table below shows three organisms and some of their characteristics. Complete the table by filling in each blank.

Characteristic	Frog	Eagle	Shark
Body covering	Moist skin	______	Scales
Reproduction (egg/live)	Egg	Egg	______
Breathing organ	Lungs / Skin	Lungs	______

[3 marks]

23. Give one difference between a flowering plant and a non-flowering plant.

______________________________________________________________________________________________

[1 mark]

24. Explain why a whale is classified as a mammal and not a fish. Give two reasons.

(a) _____________________________________________________________________________________________

(b) _____________________________________________________________________________________________

[2 marks]

25. State two characteristics that scientists use to classify animals into vertebrates and invertebrates.

(a) _____________________________________________________________________________________________

(b) _____________________________________________________________________________________________

[2 marks]

26. A student grouped the following organisms: mushroom, bread mould, yeast, toadstool.

(a) Name the group these organisms belong to.

______________________________________________________________________________________________

(b) State one characteristic of this group that is different from green plants.

______________________________________________________________________________________________

[2 marks]

27. The diagram below shows a classification key. Use the key to identify Organism X, which has the following characteristics: no backbone, has a soft body, has a shell.

Organism
├── Has backbone ──────────── Vertebrate
└── No backbone
    ├── Has jointed legs ──── Arthropod
    ├── Has soft body
    │   └── Has shell ─────── Organism X = ?
    └── No soft body ─────── Worm

What is Organism X?

______________________________________________________________________________________________

[1 mark]

28. State two differences between an insect and a spider.

Feature	Insect	Spider
Number of legs	__________	__________
Body parts	__________	__________

[2 marks]

29. Explain why it is important for scientists to classify living things into groups.

______________________________________________________________________________________________

[2 marks]

30. The following organisms were found in a garden: grasshopper, earthworm, snail, bird, mushroom.

Classify them into living and non-living, and further sort the living organisms into plants, animals, and fungi.

Category	Organisms
Plants	__________________________________________________________________________________
Animals	__________________________________________________________________________________
Fungi	__________________________________________________________________________________

[3 marks]

Section C — Structured / Open-Ended Questions (5 × 6 marks = 30 marks)

Answer all questions. Write your answers in the spaces provided. Use complete sentences and scientific terms where appropriate. Show your reasoning clearly.

31. A group of students went to a nature reserve and found the organisms listed below:

dragonfly, fern, monitor lizard, moss, crab, orchid, mushroom, pigeon

(a) Classify the organisms into the following groups: flowering plants, non-flowering plants, vertebrates, invertebrates, and fungi. Write each organism under the correct group.

[3 marks]

Group	Organisms
Flowering plants
Non-flowering plants
Vertebrates
Invertebrates
Fungi

(b) The students noticed that the dragonfly and the crab are both invertebrates. State one difference between them.

______________________________________________________________________________________________

[1 mark]

______________________________________________________________________________________________

[2 marks]

32. The table below shows the characteristics of five animals.

Animal	Body covering	Warm-blooded / Cold-blooded	Breathe using	Reproduce by
A	Feathers	Warm-blooded	Lungs	Eggs
B	Scales	Cold-blooded	Lungs	Eggs
C	Fur	Warm-blooded	Lungs	Live young
D	Scales	Cold-blooded	Gills	Eggs
E	Moist skin	Cold-blooded	Lungs and skin	Eggs

(a) Identify the group to which each animal belongs.

[3 marks]

Animal A: _____________________________________________________________________________________________
Animal B: _____________________________________________________________________________________________
Animal C: _____________________________________________________________________________________________
Animal D: _____________________________________________________________________________________________
Animal E: _____________________________________________________________________________________________

(b) Which of the animals above is a mammal? Explain your answer.

______________________________________________________________________________________________

[2 marks]

______________________________________________________________________________________________

[1 mark]

33. A student created the following classification key to sort a collection of organisms found in a park.

Organism
├── Can make its own food
│   ├── Has flowers ────────────── Flowering plant
│   └── No flowers ─────────────── Non-flowering plant
└── Cannot make its own food
    ├── Has backbone
    │   ├── Has feathers ──────── Bird
    │   └── No feathers ───────── Non-bird vertebrate
    └── No backbone
        ├── Has 6 legs ────────── Insect
        └── Does not have 6 legs ─ Other invertebrate

(a) A butterfly was found. Trace the path through the key and state which group it belongs to.

______________________________________________________________________________________________

[2 marks]

(b) A cat was found. Trace the path through the key and state which group it belongs to.

______________________________________________________________________________________________

[2 marks]

______________________________________________________________________________________________

[2 marks]

34. Read the following passage and answer the questions that follow.

In a tropical rainforest, there is a great diversity of living things. Scientists have identified over 40,000 plant species, 1,300 bird species, 3,000 fish species, and 427 mammal species in a single rainforest. To study such a vast number of organisms, scientists classify them into groups based on shared characteristics. For example, all birds have feathers and lay eggs, while all mammals have fur or hair and feed their young with milk. Plants are classified based on whether they produce flowers, seeds, or spores. Even tiny organisms like bacteria are classified — they are single-celled and do not have a nucleus.

(a) State two characteristics that all birds share according to the passage.

[2 marks]

(i) _____________________________________________________________________________________________

(ii) _____________________________________________________________________________________________

(b) How are plants classified according to the passage? State two ways.

[2 marks]

(i) _____________________________________________________________________________________________

(ii) _____________________________________________________________________________________________

______________________________________________________________________________________________

[2 marks]

35. The diagram below shows a Venn diagram with two overlapping circles, labelled Group P and Group Q.

        ┌─────────────┐
        │   Group P    │
        │  (Has       │
        │  feathers)   │
        │    ┌─────┐   │
        │    │Both │   │
        └────┤     ├───┘
             │     │
        ┌────┤     ├───┐
        │    └─────┘   │
        │   Group Q    │
        │  (Lays eggs) │
        └─────────────┘

(a) Name one organism that belongs in the overlap (both Group P and Group Q). Explain why.

______________________________________________________________________________________________

[2 marks]

(b) Name one organism that belongs in Group Q only (lays eggs but does not have feathers). Explain why.

______________________________________________________________________________________________

[2 marks]

______________________________________________________________________________________________

[2 marks]

— End of Paper —

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.

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]

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]

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.

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]

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.