From Real Exams Exam Paper
Primary 6 PSLE Science Semestral Assessment 2 (End of Year) Paper 4
Free Exam-Derived Owl Alpha Primary 6 PSLE Science Semestral Assessment 2 (End of Year) Paper 4 practice paper with questions and answers for Singapore students. This page is rendered as a direct URL so the questions and answers can be discovered without pressing in-page buttons.
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
TuitionGoWhere Practice Paper - Science Primary 6 PSLE
School: TuitionGoWhere Secondary School (AI) Subject: Science Level: Primary 6 (PSLE) Paper: SA2 — Version 4 of 5 Duration: 60 minutes Total Marks: 50
Name: ________________________ Class: ________________________ Date: ________________________
Instructions
- Answer ALL questions.
- Write your answers in the spaces provided.
- For multiple-choice questions, shade the correct option on the answer sheet.
- Show all working clearly where required.
- The use of calculators is not permitted.
Section A: Multiple Choice Questions (10 marks)
Questions 1–10 carry 1 mark each. Choose the most accurate answer.
1. Which of the following is a way to group living things based on observable characteristics?
A) Their favourite food B) Whether they have feathers, scales, or fur C) The colour of their eyes D) The sound they make at night
2. The diagram below shows a classification key. Which organism is represented by X?
┌── Has feathers ──── Bird
Living ─────────┤
organism ├── Has fins ───────── Fish
│
└── No feathers, no fins ── X
A) Butterfly B) Frog C) Earthworm D) Crab
3. Which of the following is NOT a characteristic used to classify plants?
A) Presence or absence of flowers B) Type of root system C) Number of legs D) Venation pattern of leaves
4. A student grouped the following organisms: moss, fern, mushroom. What is the best reason to remove mushroom from this group?
A) Mushrooms are too small. B) Mushrooms do not make their own food. C) Mushrooms do not have roots. D) Mushrooms are not green.
5. Which of the following materials is a good conductor of heat?
A) Plastic B) Wood C) Copper D) Rubber
6. Objects can be grouped according to the materials they are made of. Which group contains only materials that are poor conductors of electricity?
A) Iron nail, steel spoon, aluminium foil B) Rubber band, glass rod, wooden stick C) Copper wire, graphite, salt water D) Silver coin, gold ring, carbon rod
7. The diagram shows a simple classification of matter.
Matter
/ \
? Mixtures
/ \
Solids Liquids
What should replace ? in the diagram?
A) Elements B) Pure substances C) Compounds D) Solutions
8. Which property is shared by all living things?
A) They can fly. B) They have backbones. C) They respond to changes in their surroundings. D) They live on land.
9. A magnet can be used to separate a mixture of iron filings and sand. This works because ________________.
A) iron filings are magnetic but sand is not B) sand is heavier than iron filings C) iron filings dissolve in water but sand does not D) sand is attracted to magnets but iron filings are not
10. Which of the following is a characteristic of non-living things?
A) They reproduce. B) They grow by taking in nutrients. C) They do not need food for energy. D) They remove waste products from their bodies.
Section B: Short-Answer Questions (20 marks)
Questions 11–16 carry 2–3 marks each. Write your answers in the spaces provided.
11. The table below shows four organisms and some of their characteristics.
| Organism | Has backbone | Has legs | Has wings | Lives in water |
|---|---|---|---|---|
| P | Yes | Yes | No | No |
| Q | No | Yes | Yes | No |
| R | Yes | No | No | Yes |
| S | No | No | No | Yes |
(a) Identify one characteristic that organisms P and Q share but R and S do not. (1 mark)
(b) Using the information in the table, identify one organism that could be a fish. Explain your answer. (2 marks)
12. A student was given four objects: a steel key, a plastic ruler, a glass marble, and a rubber eraser.
(a) Classify these objects into good conductors of heat and poor conductors of heat. (2 marks)
| Good conductors of heat | Poor conductors of heat |
|---|---|
| ______________________ | ______________________ |
| ______________________ | ______________________ |
(b) Give one everyday use of a poor conductor of heat and explain why it is suitable. (1 mark)
13. Study the classification key below.
Step 1: Has backbone? ── Yes ──→ Go to Step 2
└── No ──→ Go to Step 3
Step 2: Has feathers? ── Yes ──→ Organism A
└── No ──→ Organism B
Step 3: Has shell? ── Yes ──→ Organism C
└── No ──→ Organism D
(a) A bat has a backbone but no feathers. Which organism (A, B, C, or D) does the bat represent? (1 mark)
(b) Name one organism that could be classified as Organism C. (1 mark)
14. The diagram shows a Venn diagram used to sort materials.
┌──────────────┐ ┌──────────────┐
│ Magnetic │ │ Transparent │
│ │ │ │
│ iron nail │ │ glass window │
│ steel paper │ │ clear plastic│
│ clip │ │ bottle │
└──────────────┘ └──────────────┘
(a) Name one material that could be placed in the overlapping region of the Venn diagram and explain why. (2 marks)
(b) Is a copper coin magnetic? State one property of copper that makes it useful for electrical wiring. (1 mark)
15. The table below lists some properties of four substances.
| Substance | Boiling point (°C) | Soluble in water | Conducts electricity |
|---|---|---|---|
| W | 100 | Yes | Yes |
| X | 78 | Yes | No |
| Y | 357 | No | Yes |
| Z | -183 | Slightly | No |
(a) Which substance is most likely water? Explain your answer. (2 marks)
(b) Based on the data, which substance is a metal? Give a reason. (1 mark)
16. A group of students classified a collection of leaves into two groups based on their venation patterns.
- Group X: Leaves with parallel venation
- Group Y: Leaves with network (reticulate) venation
(a) State the type of plant (monocotyledon or dicotyledon) that typically has leaves in Group X. (1 mark)
(b) Besides venation pattern, state two other characteristics that can be used to classify plants. (2 marks)
Section C: Structured / Long-Answer Questions (20 marks)
Questions 17–20 carry 4–6 marks each. Write your answers in the spaces provided. Use complete sentences where explanation is required.
17. A student collected eight organisms from a garden and recorded their features.
| Organism | Body covering | Number of legs | Habitat | Feeds on |
|---|---|---|---|---|
| Ant | Exoskeleton | 6 | Ground | Other insects |
| Spider | Exoskeleton | 8 | Web | Insects |
| Snail | Shell | 0 | Ground | Plants |
| Beetle | Exoskeleton | 6 | Ground | Plants |
| Lizard | Scales | 4 | Ground | Insects |
| Crab | Exoskeleton | 10 | Water | Dead matter |
| Frog | Moist skin | 4 | Water/land | Insects |
| Bird | Feathers | 2 | Air/trees | Seeds |
(a) Using the information above, construct a dichotomous classification key to separate these eight organisms into distinct groups. Your key should use observable characteristics from the table. (4 marks)
(b) Which of the above organisms are vertebrates? List them and state the characteristic that makes them vertebrates. (2 marks)
18. A science teacher provided students with five materials: copper strip, wooden block, aluminium foil, cotton cloth, and iron rod. The students were asked to investigate which materials are good conductors of electricity.
(a) Draw a labelled circuit diagram to show how you would test whether a material conducts electricity. (3 marks)
(b) Predict the results of the investigation. Classify the five materials into conductors and insulators. (2 marks)
| Conductors | Insulators |
|---|---|
| ______________________ | ______________________ |
| ______________________ | ______________________ |
| ______________________ | ______________________ |
(c) Explain why metals are generally good conductors of electricity. (1 mark)
19. The bar chart below shows the number of different types of organisms found in two habitats — a garden and a pond.
(Imagine the following data represented as a bar chart)
| Organism type | Garden | Pond |
|---|---|---|
| Insects | 30 | 12 |
| Fish | 0 | 25 |
| Plants | 15 | 8 |
| Birds | 8 | 3 |
| Frogs | 2 | 10 |
| Crabs | 0 | 6 |
(a) Which habitat has a greater diversity of organisms? Explain your answer using data from the chart. (2 marks)
(b) Explain why the pond habitat has fish but the garden habitat does not. (2 marks)
(c) Suggest one way the diversity of organisms in the garden could be increased. (1 mark)
20. A student was asked to sort a mixture of the following objects into groups: marble (glass), cork, steel ball bearing, plastic bead, wooden cube, aluminium coin, rubber ball, and feather.
(a) Describe two different ways the student could sort these objects. For each way, state the property used and list which objects belong in each group. (4 marks)
Sorting method 1:
Property used: _________________________________
Group A: _________________________________
Group B: _________________________________
Sorting method 2:
Property used: _________________________________
Group A: _________________________________
Group B: _________________________________
(b) The student used a magnet to separate some objects. Which object(s) would be attracted to the magnet? Explain your answer. (2 marks)
End of Paper
Answers
TuitionGoWhere Practice Paper — Science Primary 6 PSLE
SA2 Version 4 of 5 — Answer Key
Section A: Multiple Choice Questions (10 marks)
1. B — Whether they have feathers, scales, or fur
Classification is based on observable physical characteristics. Body covering (feathers, scales, fur) is a standard taxonomic feature used to group animals.
2. C — Earthworm
The key shows that X has no feathers and no fins. An earthworm fits this description (no feathers, no fins). A frog has no feathers or fins but is an amphibian; however, among the options, earthworm is the best fit as it is a simple invertebrate without fins or feathers.
3. C — Number of legs
Number of legs is a characteristic used to classify animals, not plants. Plants are classified by features such as presence of flowers, root type, leaf venation, and seed type.
4. B — Mushrooms do not make their own food.
Moss and ferns are plants that make their own food by photosynthesis. Mushrooms are fungi and do not photosynthesise — they obtain food from decaying matter. This is the fundamental difference.
5. C — Copper
Copper is a metal and a good conductor of heat. Plastic, wood, and rubber are insulators (poor conductors of heat).
6. B — Rubber band, glass rod, wooden stick
All three are non-metals and poor conductors of electricity. The other options contain metals (iron, aluminium, copper, silver, gold, carbon in the form of graphite) which are good conductors.
7. B — Pure substances
Matter is classified into pure substances and mixtures. Pure substances can be further divided into elements and compounds. Solids and liquids are states of matter, not a classification alongside mixtures.
8. C — They respond to changes in their surroundings.
All living things respond to stimuli. Not all living things can fly (A), have backbones (B), or live on land (D).
9. A — Iron filings are magnetic but sand is not.
A magnet attracts magnetic materials such as iron. Sand (silicon dioxide) is non-magnetic and will not be attracted.
10. C — They do not need food for energy.
Living things need food for energy, growth, and repair. Non-living things do not require food. Options A, B, and D are characteristics of living things.
Section B: Short-Answer Questions (20 marks)
11. (3 marks)
(a) Has legs (1 mark)
P and Q both have legs (Yes), while R and S do not have legs (No).
(b) Organism R (2 marks: 1 for identifying R, 1 for explanation)
R has a backbone, no legs, and lives in water. These characteristics match those of a fish. Fish have backbones (vertebrates), use fins instead of legs for movement, and live in water.
12. (3 marks)
(a) (2 marks)
| Good conductors of heat | Poor conductors of heat |
|---|---|
| Steel key | Plastic ruler |
| Glass marble* | Rubber eraser |
Steel (a metal) is a good conductor of heat. Glass is a poor conductor (insulator) in this context — correction: Glass is actually a poor conductor of heat. The correct classification is:
Good conductors of heat Poor conductors of heat Steel key Plastic ruler Glass marble Rubber eraser (1 mark for each correct column with all items correct)
(b) (1 mark) Example: A wooden/plastic handle on a cooking pot — poor conductors of heat prevent the handle from getting hot, so the user does not burn their hand.
Accept any valid example with correct explanation linking poor conductivity to the use.
13. (2 marks)
(a) Organism B (1 mark)
The bat has a backbone (Yes at Step 1) but no feathers (No at Step 2), so it is classified as Organism B.
(b) Snail / Tortoise / Crab (1 mark — accept any valid organism with a shell and no backbone)
Organism C has no backbone but has a shell. A snail fits this description.
14. (3 marks)
(a) (2 marks) Example: A transparent magnetic material is not common, but accept a student reasoning that a material could be both magnetic and transparent — however, in practice, most magnetic materials are opaque. Award marks for valid reasoning.
Alternative acceptable answer: A steel (iron-coated) transparent material — e.g., a thin steel mesh that allows some light through. Award 1 mark for a reasonable material and 1 mark for explanation.
Best answer: There is no common material that is both fully magnetic and fully transparent. The overlapping region may be empty. Award 2 marks if the student states this with reasoning.
(b) (1 mark) A copper coin is not magnetic. Copper is a good conductor of electricity, which makes it useful for electrical wiring.
Award 1 mark for both parts correct.
15. (3 marks)
(a) (2 marks) Substance W — It has a boiling point of 100°C, is soluble in water, and conducts electricity (likely a salt solution or water with dissolved ions). Pure water boils at 100°C.
Award 1 mark for identifying W and 1 mark for linking the boiling point of 100°C to water.
(b) (1 mark) Substance Y — It has a high boiling point (357°C), does not dissolve in water, and conducts electricity. These are typical properties of a metal (e.g., mercury boils at 357°C).
Accept identification of Y with any one correct property as reason.
16. (3 marks)
(a) Monocotyledon (1 mark)
Monocotyledons typically have parallel venation in their leaves.
(b) (2 mark) Any two of the following:
- Presence or absence of flowers
- Type of root system (tap root or fibrous root)
- Venation pattern of leaves (parallel or reticulate)
- Number of cotyledons in the seed
- Whether the plant is woody or herbaceous
(1 mark each, maximum 2 marks)
Section C: Structured / Long-Answer Questions (20 marks)
17. (6 marks)
(a) (4 marks) Sample dichotomous key:
1a. Has backbone ─────────────────────────── Go to 2
1b. No backbone ──────────────────────────── Go to 5
2a. Has feathers ──────────────────────────── Bird
2b. No feathers ───────────────────────────── Go to 3
3a. Has scales ────────────────────────────── Lizard
3b. No scales ─────────────────────────────── Go to 4
4a. Has moist skin, 4 legs ────────────────── Frog
4b. No moist skin ─────────────────────────── (none in this set)
5a. Has 6 legs ────────────────────────────── Go to 6
5b. Does not have 6 legs ──────────────────── Go to 7
6a. Feeds on other insects ────────────────── Ant
6b. Feeds on plants ───────────────────────── Beetle
7a. Has 8 legs ────────────────────────────── Spider
7b. Does not have 8 legs ──────────────────── Go to 8
8a. Has a shell ───────────────────────────── Snail
8b. Has 10 legs, lives in water ────────────── Crab
Marking scheme: Award 1 mark for each correctly separated pair/groups (up to 4 marks). The key must use observable characteristics from the table and correctly separate all 8 organisms. Deduct marks if organisms are misclassified or if the key is incomplete.
(b) (2 marks) Vertebrates: Lizard, Frog, Bird
These organisms have backbones. (1 mark for listing all three correctly, 1 mark for stating that they have backbones/are vertebrates.)
Common mistake: Students may forget that frogs and fish are vertebrates because they do not have obvious external bones. Award partial credit (1 mark) if only 2 of 3 are listed.
18. (6 marks)
(a) (3 marks) Circuit diagram should include:
- A battery/power source (1 mark)
- A bulb or ammeter in series (1 mark)
- The test material connected in the circuit with a gap/switch (1 mark)
Expected diagram description: A simple series circuit with a battery, connecting wires, a bulb, and a gap where the test material is inserted. If the material is a conductor, the bulb lights up; if it is an insulator, the bulb does not light up.
(b) (2 marks)
| Conductors | Insulators |
|---|---|
| Copper strip | Wooden block |
| Aluminium foil | Cotton cloth |
| Iron rod |
(1 mark for each column correct. All three metals must be in Conductors; both non-metals in Insulators.)
(c) (1 mark) Metals have free electrons that can move easily through the material, carrying electric current.
Accept equivalent wording: "Metals contain delocalised/mobile electrons that allow electricity to flow."
19. (5 marks)
(a) (2 marks) The garden has a greater diversity of organisms. It contains 5 different types of organisms (insects, plants, birds, frogs, and no fish or crabs), while the pond has 6 types. Correction: The pond has 6 types (insects, fish, plants, birds, frogs, crabs) and the garden has 4 types (insects, plants, birds, frogs — no fish, no crabs).
The pond has greater diversity because it has 6 different types of organisms compared to 4 types in the garden. (1 mark for correct habitat, 1 mark for using data as evidence.)
(b) (2 marks) Fish need water to survive — they breathe through gills that extract dissolved oxygen from water. The garden habitat does not have a body of water, so fish cannot survive there. The pond provides the aquatic environment that fish need.
(1 mark for mentioning water/aquatic habitat, 1 mark for linking to fish survival/breathing.)
(c) (1 mark) Example: Plant more flowering plants to attract insects and birds / Add a small pond to attract frogs and fish / Create a compost area to attract decomposers.
Accept any reasonable suggestion that would increase the variety of organisms.
20. (6 marks)
(a) (4 marks — 2 marks per sorting method)
Sorting method 1:
Property used: Magnetic vs non-magnetic
- Group A (Magnetic): Steel ball bearing, aluminium coin* (*aluminium is NOT magnetic — correction below)
- Group B (Non-magnetic): Marble, cork, plastic bead, wooden cube, rubber ball, feather
Corrected:
- Group A (Magnetic): Steel ball bearing
- Group B (Non-magnetic): Marble (glass), cork, plastic bead, wooden cube, aluminium coin, rubber ball, feather
(1 mark for valid property, 1 mark for correct grouping)
Sorting method 2:
Property used: Floats in water vs sinks in water
- Group A (Floats): Cork, plastic bead*, wooden cube, feather
- Group B (Sinks): Marble (glass), steel ball bearing, aluminium coin, rubber ball
(1 mark for valid property, 1 mark for correct grouping)
Alternative acceptable methods: Hard/soft, natural/synthetic material, transparent/opaque, flexible/rigid, etc.
(b) (2 marks) Steel ball bearing would be attracted to the magnet. Steel contains iron, which is a magnetic material. The other objects (glass, cork, plastic, wood, aluminium, rubber, feather) are non-magnetic and would not be attracted.
(1 mark for identifying steel ball bearing, 1 mark for explanation involving magnetic material/iron content.)
Mark Summary
| Section | Marks |
|---|---|
| A: MCQ (Q1–10) | 10 |
| B: Short Answer (Q11–16) | 20 |
| C: Structured (Q17–20) | 20 |
| Total | 50 |