AI Generated Exam Paper
Primary 6 PSLE Science Practice Paper 2
Free P6 PSLE Science Practice Paper 2, Nemo3 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
TuitionGoWhere Practice Paper - Science Primary 6 PSLE
TuitionGoWhere Practice Paper (AI)
Subject: Science
Level: Primary 6 PSLE
Paper: Practice Paper 2 (Version 2 of 5)
Duration: 1 hour 45 minutes
Total Marks: 100
Name: ________________________
Class: ________________________
Date: ________________________
INSTRUCTIONS TO CANDIDATES
- Do not open this booklet until you are told to do so.
- Follow all instructions carefully.
- Answer all questions.
- The number of marks is given in brackets [ ] at the end of each question or part question.
- The total marks for this paper is 100.
- For Section A, shade your answers on the Optical Answer Sheet (OAS) provided.
- For Section B, write your answers in the spaces provided in this booklet.
SECTION A (56 marks)
Questions 1 to 28 carry 2 marks each. For each question, four options are given. Choose the correct answer and shade the correct oval (1, 2, 3 or 4) on the Optical Answer Sheet.
Question 1
Which of the following statements about living things is correct?
(1) All living things can make their own food. (2) All living things reproduce by laying eggs. (3) All living things respond to changes in their surroundings. (4) All living things need oxygen to survive.
[2]
Question 2
Study the classification chart below.
Generated diagram for Q2.
Which of the following headings best represent Group X, Group Y and Group Z?
| Group X | Group Y | Group Z | |
|---|---|---|---|
| (1) | Fungi | Plants | Animals |
| (2) | Bacteria | Plants | Animals |
| (3) | Fungi | Animals | Plants |
| (4) | Plants | Fungi | Animals |
[2]
Question 3
The diagram below shows a cell.
Generated diagram for Q3.
Which of the following statements about this cell is correct?
(1) It is an animal cell because it has a nucleus. (2) It is a plant cell because it has chloroplasts. (3) It is a bacterial cell because it has a cell wall. (4) It is a fungal cell because it has a large central vacuole.
[2]
Question 4
Four students made the following statements about microorganisms.
| Student | Statement |
|---|---|
| A | All microorganisms are harmful. |
| B | Yeast is a microorganism that can reproduce by budding. |
| C | Bacteria can only be seen with an electron microscope. |
| D | Mould is a type of bacteria. |
Which student made a correct statement?
(1) A (2) B (3) C (4) D
[2]
Question 5
The table below shows the characteristics of four organisms, P, Q, R and S. A tick (✓) indicates the presence of the characteristic.
| Characteristic | P | Q | R | S |
|---|---|---|---|---|
| Has cell wall | ✓ | ✓ | ✓ | ✗ |
| Has chloroplasts | ✓ | ✗ | ✗ | ✗ |
| Reproduces by spores | ✗ | ✓ | ✗ | ✗ |
| Feeds on dead/decaying matter | ✗ | ✓ | ✗ | ✗ |
Which organism is most likely a fungus?
(1) P (2) Q (3) R (4) S
[2]
Question 6
Study the flowchart below.
Generated diagram for Q6.
Animal X lays eggs, has dry scaly skin, and breathes through lungs. Which group does Animal X belong to?
(1) Fish (2) Amphibian (3) Reptile (4) Bird
[2]
Question 7
Which of the following groups of materials are all non-magnetic?
(1) Iron nail, steel paper clip, nickel coin (2) Copper wire, aluminium foil, plastic ruler (3) Cobalt bar, iron filings, steel spoon (4) Nickel ring, iron chain, steel needle
[2]
Question 8
The diagram below shows a magnet brought near a steel paper clip.
Generated diagram for Q8.
What will happen if the magnet is flipped so that the S pole faces the paper clip?
(1) The paper clip will be repelled. (2) The paper clip will still be attracted. (3) The paper clip will not be affected. (4) The paper clip will become a permanent magnet.
[2]
Question 9
Four bars, W, X, Y and Z, are tested with a magnet. The results are shown below.
| Bar | Observation when brought near N-pole of magnet | Observation when brought near S-pole of magnet |
|---|---|---|
| W | Attracted | Attracted |
| X | Repelled | Attracted |
| Y | Attracted | Repelled |
| Z | No effect | No effect |
Which bar is a magnet?
(1) W (2) X (3) Y (4) Z
[2]
Question 10
Which of the following statements about magnetic separation is correct?
(1) It can separate a mixture of iron filings and sulphur powder. (2) It can separate a mixture of copper and aluminium pieces. (3) It can separate a mixture of sand and salt. (4) It can separate a mixture of water and oil.
[2]
Question 11
Study the classification table below.
| Material | Property |
|---|---|
| A | Flexible, waterproof, transparent |
| B | Rigid, waterproof, opaque |
| C | Flexible, absorbent, opaque |
| D | Rigid, waterproof, transparent |
Which material is most suitable for making a raincoat?
(1) A (2) B (3) C (4) D
[2]
Question 12
The diagram below shows the volume of water in a measuring cylinder before and after a stone is lowered into it.
Generated diagram for Q12.
What is the volume of the stone?
(1) 22 cm³ (2) 22 ml (3) 122 cm³ (4) 122 ml
[2]
Question 13
Which of the following shows the correct state change?
| Process | Change of State | |
|---|---|---|
| (1) | Melting | Gas → Liquid |
| (2) | Freezing | Liquid → Solid |
| (3) | Boiling | Solid → Liquid |
| (4) | Condensation | Liquid → Gas |
[2]
Question 14
The table below shows the melting and boiling points of four substances.
| Substance | Melting Point (°C) | Boiling Point (°C) |
|---|---|---|
| P | -114 | 78 |
| Q | 0 | 100 |
| R | 1538 | 2862 |
| S | -39 | 357 |
At room temperature (30°C), which substance(s) is/are in the liquid state?
(1) P only (2) P and Q only (3) P, Q and S only (4) All of them
[2]
Question 15
Water exists in three states. Which of the following statements about the water cycle is correct?
(1) Evaporation only occurs at 100°C. (2) Condensation occurs when water vapour loses heat. (3) Clouds are formed by evaporation. (4) Rain is formed when water vapour gains heat.
[2]
Question 16
The diagram below shows a food chain.
Generated diagram for Q16.
Which of the following statements is correct?
(1) The grass is a consumer. (2) The frog is both a predator and a prey. (3) The eagle is a producer. (4) The grasshopper is a decomposer.
[2]
Question 17
Study the food web below.
Generated diagram for Q17.
If all the frogs are removed from this food web, which population is most likely to increase?
(1) Grasshopper (2) Snake (3) Hawk (4) Rabbit
[2]
Question 18
Which of the following adaptations helps a plant survive in a desert environment?
(1) Broad leaves to absorb more sunlight (2) Deep roots to absorb water from deep underground (3) Thin stem to store less water (4) Large flowers to attract more pollinators
[2]
Question 19
The diagram below shows a polar bear.
Generated diagram for Q19.
Which adaptation helps the polar bear reduce heat loss in its cold environment?
(1) Thick white fur (2) Thick layer of fat (3) Small ears (4) All of the above
[2]
Question 20
Which of the following shows a structural adaptation of a fish for living in water?
(1) Gills for breathing underwater (2) Swimming in schools for protection (3) Migrating to warmer waters in winter (4) Laying many eggs to ensure survival
[2]
Question 21
The diagram below shows a plant growing towards light.
Image pending generation: diagram for Q21.
This response of the plant to light is an example of:
(1) Reproduction (2) Sensitivity (3) Nutrition (4) Respiration
[2]
Question 22
Which of the following is a behavioural adaptation?
(1) A camel has a hump to store fat. (2) A chameleon changes colour to blend in. (3) A cactus has spines instead of leaves. (4) A bird has hollow bones for flight.
[2]
Question 23
The diagram below shows the life cycle of a butterfly.
Generated diagram for Q23.
At which stage does the butterfly cause the most damage to crops?
(1) Egg (2) Larva (3) Pupa (4) Adult
[2]
Question 24
Which of the following processes requires energy from food?
(1) Photosynthesis (2) Respiration (3) Transpiration (4) Germination
[2]
Question 25
The diagram below shows an experiment on photosynthesis.
Generated experimental_setup for Q25.
What is the purpose of Plant B in this experiment?
(1) To show that plants need water for photosynthesis (2) To act as a control to show that light is needed for photosynthesis (3) To show that plants need carbon dioxide for photosynthesis (4) To show that plants produce oxygen during photosynthesis
[2]
Question 26
Which of the following gases is produced during photosynthesis?
(1) Carbon dioxide (2) Oxygen (3) Nitrogen (4) Water vapour
[2]
Question 27
Study the diagram of a human respiratory system.
Generated diagram for Q27.
Where does gaseous exchange take place?
(1) Trachea (2) Bronchi (3) Alveoli (4) Diaphragm
[2]
Question 28
The table below shows the composition of inhaled and exhaled air.
| Gas | Inhaled Air (%) | Exhaled Air (%) |
|---|---|---|
| Oxygen | 21 | 16 |
| Carbon dioxide | 0.04 | 4 |
| Nitrogen | 78 | 78 |
| Water vapour | Variable | Saturated |
Which statement correctly describes the change in air composition during respiration?
(1) Oxygen increases and carbon dioxide decreases. (2) Oxygen decreases and carbon dioxide increases. (3) Nitrogen increases and oxygen decreases. (4) Water vapour decreases and carbon dioxide increases.
[2]
SECTION B (44 marks)
Questions 29 to 40 carry 2 to 5 marks each. Write your answers in the spaces provided.
Question 29
The diagram below shows three organisms, A, B and C.
Generated diagram for Q29.
(a) Classify organisms A, B and C into the correct groups: Fungi, Plants, or Animals. [2]
Organism A: ________________________ Organism B: ________________________ Organism C: ________________________
(b) State one characteristic of Organism A that distinguishes it from Organism B. [1]
(c) State one similarity between Organism B and Organism C. [1]
Question 30
The diagram below shows a cell.
Generated diagram for Q30.
(a) Is this a plant cell or an animal cell? [1]
(b) Give one reason for your answer in (a). [1]
(c) Name the part of the cell where respiration takes place. [1]
(d) State the function of the cell membrane. [1]
Question 31
John placed a bar magnet into a box of iron nails. He then lifted the magnet out.
Generated diagram for Q31.
(a) Where on the magnet will the most nails be attracted? [1]
(b) Explain your answer in (a). [1]
(c) John strokes an iron nail with a magnet 50 times in the same direction. The nail becomes a magnet. What is this method of making a magnet called? [1]
(d) State one way to demagnetise the nail. [1]
Question 32
The diagram below shows the water cycle.
Generated diagram for Q32.
(a) Name the process at X where water vapour changes into tiny water droplets. [1]
(b) The water in the sea is salty, but rain water is not salty. Explain why. [2]
(c) State one way in which human activities can affect the water cycle. [1]
Question 33
The table below shows the properties of four materials, W, X, Y and Z.
| Material | Flexible | Waterproof | Transparent | Strong |
|---|---|---|---|---|
| W | Yes | Yes | No | Yes |
| X | No | Yes | Yes | Yes |
| Y | Yes | No | No | No |
| Z | No | Yes | No | Yes |
(a) Which material is most suitable for making a window pane? [1]
(b) Explain your choice in (a) based on the properties in the table. [2]
(c) Which material is most suitable for making a raincoat? [1]
Question 34
Study the food web below.
Generated diagram for Q34.
(a) Identify the producer in this food web. [1]
(b) How many food chains can you identify in this food web? [1]
(c) If the population of zooplankton decreases drastically, explain how this will affect the population of penguins. [2]
(d) State the role of decomposers in this food web. [1]
Question 35
The diagram below shows a cactus plant.
Image pending generation: diagram for Q35.
(a) The cactus has spines instead of broad leaves. State how this adaptation helps the cactus survive in the desert. [1]
(b) The cactus has a thick fleshy stem. State its function. [1]
(c) The cactus has shallow but extensive roots. Explain how this helps the cactus absorb water. [2]
(d) State one behavioural adaptation of a desert animal. [1]
Question 36
The diagram below shows the life cycle of a mosquito.
Generated diagram for Q36.
(a) Name the stage that comes after the larva stage. [1]
(b) Both the larva and pupa stages live in water. State one difference between the larva and pupa in terms of movement. [1]
(c) Mosquitoes spread diseases like dengue. State one way to prevent mosquitoes from breeding. [1]
(d) The diagram below shows a method to control mosquito population.
Generated diagram for Q36.
Name this method of controlling pests. [1]
Question 37
The diagram below shows an experiment to investigate the conditions needed for germination.
Generated experimental_setup for Q37.
(a) In which setup(s) will the seeds germinate? [1]
(b) What is the purpose of Setup B? [1]
(c) What is the purpose of the layer of oil in Setup C? [1]
(d) State the three conditions necessary for seed germination. [1]
Question 38
The diagram below shows a plant cell and an animal cell.
Generated diagram for Q38.
(a) Name two structures found in the plant cell but not in the animal cell. [2]
(b) State the function of chloroplasts. [1]
(c) The diagram below shows a root hair cell.
Generated diagram for Q38.
Explain how the root hair helps the plant absorb water more efficiently. [2]
Question 39
The diagram below shows a simple electrical circuit with a magnet.
Generated experimental_setup for Q39.
(a) What happens to the paper clips when the switch is closed? [1]
(b) Explain why this happens. [2]
(c) State two ways to increase the strength of this electromagnet. [2]
Question 40
The diagram below shows the human digestive system.
Generated diagram for Q40.
(a) In which organ does digestion of food begin? [1]
(b) State the function of the small intestine. [1]
(c) The liver produces bile. State the function of bile in digestion. [1]
(d) Name the organ where water is absorbed from undigested food. [1]
END OF PAPER
Answers
TuitionGoWhere Practice Paper - Science Primary 6 PSLE (Answer Key)
Subject: Science
Level: Primary 6 PSLE
Paper: Practice Paper 2 (Version 2 of 5)
Total Marks: 100
SECTION A (56 marks)
Question 1
Answer: (3)
Explanation: All living things respond to changes in their surroundings (sensitivity). This is one of the seven life processes.
- (1) is incorrect: Only plants (producers) make their own food; animals and fungi cannot.
- (2) is incorrect: Reproduction methods vary (live birth, eggs, spores, budding, binary fission).
- (4) is incorrect: Some microorganisms (anaerobic bacteria) do not need oxygen.
Question 2
Answer: (1)
Explanation:
- Group X (mushroom, yeast, mould) → Fungi
- Group Y (fern, moss, rose plant) → Plants
- Group Z (lion, eagle, fish) → Animals
Question 3
Answer: (2)
Explanation: The cell has chloroplasts, which are only found in plant cells (and some protists). It also has a cell wall and large central vacuole, confirming it is a plant cell.
- (1) Animal cells lack chloroplasts and cell walls.
- (3) Bacterial cells lack a true nucleus and membrane-bound organelles like chloroplasts.
- (4) Fungal cells have cell walls (made of chitin) but lack chloroplasts.
Question 4
Answer: (2)
Explanation: Yeast is a fungus (microorganism) that reproduces asexually by budding.
- A: Many microorganisms are beneficial (e.g., yeast in bread, bacteria in yoghurt, decomposers).
- C: Bacteria can be seen with a light microscope (typically 1000x magnification); electron microscopes are for viruses and detailed internal structures.
- D: Mould is a fungus, not a bacterium.
Question 5
Answer: (2)
Explanation: Organism Q has a cell wall, reproduces by spores, and feeds on dead/decaying matter (saprotrophic nutrition) — all characteristics of fungi. It lacks chloroplasts, so it is not a plant.
- P has chloroplasts → plant.
- R has cell wall only → could be plant or fungus, but no other fungal traits shown.
- S has no cell wall → animal.
Question 6
Answer: (3)
Explanation: Following the flowchart:
- Has feathers? No → Has hair/fur? No → Has scales? Yes → Lives in water and breathes through gills? No (breathes through lungs) → Reptile.
Reptiles have dry scaly skin, lay eggs, and breathe through lungs.
Question 7
Answer: (2)
Explanation: Copper, aluminium, and plastic are all non-magnetic materials. Iron, steel, nickel, and cobalt are magnetic.
Question 8
Answer: (2)
Explanation: A magnet attracts magnetic materials (like steel) at both poles. The paper clip will be attracted to either the N-pole or S-pole. Only like poles repel (N-N or S-S).
Question 9
Answer: (2) or (3)
Explanation: A magnet has two poles and will repel one pole of another magnet while attracting the other.
- Bar X: Repelled by N-pole, attracted by S-pole → X is a magnet with its N-pole facing the test magnet's N-pole.
- Bar Y: Attracted by N-pole, repelled by S-pole → Y is a magnet with its S-pole facing the test magnet's N-pole.
Both X and Y are magnets. (Note: If only one answer allowed, either X or Y is acceptable as "a magnet".)
Question 10
Answer: (1)
Explanation: Magnetic separation uses a magnet to attract magnetic materials from non-magnetic ones. Iron filings are magnetic; sulphur powder is not. The other mixtures contain no magnetic materials.
Question 11
Answer: (1)
Explanation: A raincoat needs to be flexible (to wear), waterproof (to repel rain), and transparent (to see through, e.g., hood). Material A has all three properties.
Question 12
Answer: (1)
Explanation: Volume of stone = Final volume - Initial volume = 72 ml - 50 ml = 22 ml. Since 1 ml = 1 cm³, the volume is 22 cm³.
Question 13
Answer: (2)
Explanation: Freezing is the change of state from liquid to solid (e.g., water to ice).
- (1) Melting: Solid → Liquid
- (3) Boiling: Liquid → Gas
- (4) Condensation: Gas → Liquid
Question 14
Answer: (3)
Explanation: At 30°C (room temperature):
- P: Melting point -114°C, Boiling point 78°C → 30°C is between -114 and 78 → Liquid
- Q: Melting point 0°C, Boiling point 100°C → 30°C is between 0 and 100 → Liquid
- R: Melting point 1538°C → 30°C is below melting point → Solid
- S: Melting point -39°C, Boiling point 357°C → 30°C is between -39 and 357 → Liquid
So P, Q, and S are liquids.
Question 15
Answer: (2)
Explanation: Condensation occurs when water vapour loses heat and changes into liquid water droplets (e.g., cloud formation, dew).
- (1) Evaporation occurs at all temperatures, not only 100°C.
- (3) Clouds are formed by condensation, not evaporation.
- (4) Rain is formed when water vapour loses heat (condenses), not gains heat.
Question 16
Answer: (2)
Explanation: The frog eats grasshoppers (predator) and is eaten by snakes (prey).
- (1) Grass is a producer (makes its own food).
- (3) Eagle is a top consumer/carnivore.
- (4) Grasshopper is a primary consumer (herbivore).
Question 17
Answer: (1)
Explanation: Frogs eat grasshoppers. If frogs are removed, the grasshopper population loses a predator and will likely increase. Snakes and hawks (which eat frogs) would decrease. Rabbits are not directly connected to frogs in this web.
Question 18
Answer: (2)
Explanation: Deep roots allow the plant to access water deep underground in arid environments.
- (1) Broad leaves increase water loss through transpiration.
- (3) Thin stems store less water; desert plants need thick stems for water storage.
- (4) Large flowers increase water loss and are not a primary survival adaptation.
Question 19
Answer: (4)
Explanation: All three adaptations reduce heat
<stage5_exam_answers_md>
TuitionGoWhere Practice Paper - Science Primary 6 PSLE (Answer Key)
Subject: Science
Level: Primary 6 PSLE
Paper: Practice Paper 2 (Version 2 of 5)
Total Marks: 100
SECTION A (56 marks)
| Question | Answer | Explanation |
|---|---|---|
| 1 | (3) | All living things respond to changes in their surroundings (sensitivity). Not all make food (only plants), reproduce by laying eggs (mammals give birth), or need oxygen (anaerobic bacteria). |
| 2 | (1) | Group X: mushroom, yeast, mould → Fungi. Group Y: fern, moss, rose plant → Plants. Group Z: lion, eagle, fish → Animals. |
| 3 | (2) | The cell has chloroplasts, cell wall, and large central vacuole → plant cell. Animal cells lack these. Bacterial cells lack nucleus. Fungal cells have cell walls but no chloroplasts. |
| 4 | (2) | Student B: Yeast reproduces by budding (correct). A: Not all microorganisms are harmful. C: Bacteria can be seen with light microscope. D: Mould is fungi, not bacteria. |
| 5 | (2) | Organism Q: Has cell wall, reproduces by spores, feeds on dead/decaying matter, no chloroplasts → fungus. P has chloroplasts (plant). R has cell wall only. S has no cell wall (animal). |
| 6 | (3) | Animal X: lays eggs, dry scaly skin, breathes through lungs → Reptile. Fish have gills. Amphibians have moist skin. Birds have feathers. |
| 7 | (2) | Copper, aluminium, plastic are non-magnetic. Others contain magnetic materials (iron, steel, nickel, cobalt). |
| 8 | (2) | Both poles of a magnet attract magnetic materials (like steel paper clips). Only like poles repel. |
| 9 | (2) or (3) | A magnet shows repulsion with one pole and attraction with the other. Bar X: Repelled by N, attracted by S → X is a magnet with S pole facing N. Bar Y: Attracted by N, repelled by S → Y is a magnet with N pole facing N. Both X and Y are magnets. Note: Question may have intended only one correct answer; typically the bar repelled by one pole is the magnet. |
| 10 | (1) | Magnetic separation separates magnetic from non-magnetic materials. Iron filings (magnetic) and sulphur (non-magnetic). Copper/aluminium both non-magnetic. Sand/salt both non-magnetic. Water/oil are liquids. |
| 11 | (1) | Raincoat needs: flexible (to wear), waterproof (repel rain), transparent (see through - optional but A fits best). B is rigid. C is absorbent. D is rigid. |
| 12 | (1) | Volume of stone = Final volume - Initial volume = 72 ml - 50 ml = 22 ml = 22 cm³ (1 ml = 1 cm³). |
| 13 | (2) | Freezing: Liquid → Solid. Melting: Solid → Liquid. Boiling: Liquid → Gas. Condensation: Gas → Liquid. |
| 14 | (3) | At 30°C: P (-114 to 78) → liquid. Q (0 to 100) → liquid. R (1538 to 2862) → solid. S (-39 to 357) → liquid. So P, Q, S are liquids. |
| 15 | (2) | Condensation occurs when water vapour loses heat and changes to liquid. Evaporation occurs at all temperatures. Clouds form by condensation. Rain forms when water vapour loses heat (condenses). |
| 16 | (2) | Frog eats grasshopper (predator) and is eaten by snake (prey). Grass is producer. Eagle is consumer. Grasshopper is consumer (herbivore). |
| 17 | (1) | Frogs eat grasshoppers. If frogs removed, grasshopper population increases (less predation). Snakes lose food source (decrease). Hawks may decrease. Rabbits unaffected directly. |
| 18 | (2) | Desert plants: deep roots for water, reduced leaves (spines), thick stems for water storage. Broad leaves lose water. Thin stems store less. Large flowers not key for survival. |
| 19 | (4) | All listed adaptations reduce heat loss: thick fur (insulation), fat layer (insulation), small ears (reduce surface area), padded feet (insulation from ice). |
| 20 | (1) | Gills for breathing underwater is a structural (physical) adaptation. Others are behavioural adaptations. |
| 21 | (2) | Plant bending towards light shows sensitivity (response to stimulus). Phototropism. |
| 22 | (2) | Chameleon changing colour is a behavioural adaptation (action). Others are structural (physical features). |
| 23 | (2) | Larva (caterpillar) stage feeds voraciously on leaves, causing crop damage. Egg, pupa, adult do not eat crops significantly. |
| 24 | (2) | Respiration releases energy from food. Photosynthesis stores energy. Transpiration is water loss. Germination uses stored energy. |
| 25 | (2) | Plant B (in dark) is the control to show light is needed for photosynthesis (starch only in Plant A). |
| 26 | (2) | Photosynthesis: CO₂ + H₂O → glucose + O₂. Oxygen is produced. |
| 27 | (3) | Gaseous exchange occurs in alveoli (air sacs) where O₂ and CO₂ diffuse between air and blood. |
| 28 | (2) | During respiration: O₂ used (21% → 16%), CO₂ produced (0.04% → 4%). N₂ unchanged. Water vapour increases. |
SECTION B (44 marks)
Question 29
(a) [2 marks]
- Organism A: Fungi
- Organism B: Plants
- Organism C: Animals
(b) [1 mark]
- Organism A (mushroom) feeds on dead/decaying matter (saprotrophic nutrition) / reproduces by spores / has no chloroplasts/cannot photosynthesise / body made of hyphae/mycelium. (Any one valid difference from plants)
(c) [1 mark]
- Both are living things / made of cells / need air, food, water / reproduce / respond to changes / grow. (Any one valid similarity between plants and animals)
Question 30
(a) [1 mark]
- Animal cell
(b) [1 mark]
- It has no cell wall / no chloroplasts / no large central vacuole. (Any one correct absence of plant cell feature)
Question 31
(a) [1 mark]
- Repulsion / The magnets repel each other.
(b) [1 mark]
- Like poles (N-N or S-S) face each other and like poles repel.
(c) [1 mark]
- Turn one magnet around so that unlike poles (N-S) face each other / Flip one magnet.
Question 32
(a) [1 mark]
- 20 cm³ (50 cm³ - 30 cm³ = 20 cm³)
(b) [1 mark]
- The stone has a fixed volume and displaces its own volume of water. / Volume of stone = volume of water displaced.
(c) [1 mark]
- The water level will remain the same / stay at 50 cm³. (Cork floats, displaces only its weight, not full volume; or if pushed down, but question implies just placed)
Question 33
(a) [1 mark]
- Solid → Liquid / Melting
(b) [1 mark]
- The ice cream gains heat from the warmer surroundings.
(c) [1 mark]
- Condensation / Water vapour in the surrounding air loses heat to the cold cup and condenses into water droplets.
Question 34
(a) [1 mark]
- Water cycle / The continuous movement of water on, above, and below the surface of the Earth.
(b) [2 marks]
- Evaporation: Water from seas/rivers gains heat from Sun, changes to water vapour, rises.
- Condensation: Water vapour rises, loses heat to cooler air at higher altitude, condenses into tiny water droplets forming clouds.
- Precipitation: Droplets merge, become heavy, fall as rain.
- Collection: Rain flows back to rivers/seas. (Any 2 correct processes in order for 2 marks)
(c) [1 mark]
- The Sun / Heat from the Sun.
Question 35
(a) [1 mark]
- Producer / Food producer / Makes its own food via photosynthesis.
(b) [1 mark]
- Energy is lost as heat / waste / uneaten parts at each trophic level / Only about 10% energy transferred / Not all organisms are eaten. (Any valid reason)
(c) [1 mark]
- Population of deer will increase (less predation) → Population of grass will decrease (more deer eating grass). OR Tiger population may decrease (less food). (Any one valid effect)
Question 36
(a) [1 mark]
- Camouflage / Blends with surroundings to hide from predators/prey.
(b) [1 mark]
- Structural adaptation (physical feature: colour/pattern of fur).
(c) [1 mark]
- Behavioural adaptation: Arctic fox hunts at night / migrates / curls up to sleep. (Any valid behavioural adaptation)
Question 37
(a) [1 mark]
- Larva / Caterpillar / Mealworm larva
(b) [1 mark]
- Pupa / Mealworm pupa
(c) [1 mark]
- Complete metamorphosis / Holometabolism (4 stages: egg, larva, pupa, adult).
(d) [1 mark]
- Larva (feeds and grows rapidly, moults several times).
Question 38
(a) [1 mark]
- To take in oxygen and give out carbon dioxide / Gaseous exchange.
(b) [1 mark]
- Oxygen is transported by blood to all cells for respiration to release energy.
(c) [1 mark]
- Diaphragm moves down / contracts, ribs move up and out → chest volume increases → air pressure in lungs decreases → air rushes in. (Key points: diaphragm down, volume up, pressure down, air in)
(d) [1 mark]
- Exhaled air has more carbon dioxide / less oxygen / more water vapour / warmer. (Any one correct difference)
Question 39
(a) [1 mark]
- Light energy → Chemical energy (in food/starch) / Light energy → Chemical potential energy.
(b) [1 mark]
- Chlorophyll / Chloroplasts (contain chlorophyll).
(c) [1 mark]
- Carbon dioxide + Water → (Light + Chlorophyll) → Glucose + Oxygen / 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
(d) [1 mark]
- Destarch the plant / Remove existing starch / Ensure any starch found later is made during experiment.
Question 40
(a) [1 mark]
- C (Copper - best conductor among options, or if table given: material with highest thermal conductivity)
(b) [1 mark]
- Metal is a good conductor of heat / Heat from hot water travels quickly through metal handle to hand / Handle becomes too hot to hold.
(c) [1 mark]
- Plastic / Wood / Rubber (Any poor conductor/insulator).
(d) [1 mark]
- Poor conductor of heat / Insulator / Does not conduct heat well / Heat from hot water does not travel easily to handle.
END OF ANSWER KEY
Free quiz and exam paper access
Enter your details to view this paper
Your access is remembered on this device.