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Primary 5 Science Practice Paper 2
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Questions
TuitionGoWhere Practice Paper - Science Primary 5
TuitionGoWhere Practice Paper (AI)
Subject: Science
Level: Primary 5
Paper: Practice Paper 2 (Version 2 of 5)
Duration: 1 hour 45 minutes
Total Marks: 100
Name: ________________________
Class: Primary 5 ______
Date: ________________________
INSTRUCTIONS TO CANDIDATES
- This paper consists of two sections: Section A and Section B.
- Section A (56 marks): 28 Multiple-Choice Questions. Choose the correct answer and shade the oval (1, 2, 3, or 4) on the Optical Answer Sheet (OAS) provided.
- Section B (44 marks): 12 Open-Ended Questions. Write your answers in the spaces provided in this booklet.
- The total marks for this paper is 100.
- Answer all questions.
- The use of calculators is not allowed.
SECTION A (56 marks)
Questions 1 to 28 carry 2 marks each.
1
Which of the following statements about living things is correct?
(1) All living things reproduce by laying eggs.
(2) All living things need air, food, and water to survive.
(3) All living things can make their own food.
(4) All living things move from place to place.
2
Study the classification chart below.
<image_placeholder> id: Q2-fig1 type: diagram linked_question: Q2 description: A classification chart showing two main groups: Living Things and Non-Living Things. Under Living Things, there are two sub-groups: Group X and Group Y. Group X has examples: Mushroom, Yeast, Mould. Group Y has examples: Rose plant, Oak tree, Grass. Non-Living Things has examples: Rock, Water, Metal. labels: Group X, Group Y, Mushroom, Yeast, Mould, Rose plant, Oak tree, Grass, Rock, Water, Metal values: None must_show: Clear hierarchy with two main branches (Living/Non-Living), two sub-groups under Living Things with three examples each, three examples under Non-Living Things </image_placeholder>
Which of the following headings best represent Group X and Group Y?
| Group X | Group Y | |
|---|---|---|
| (1) | Fungi | Plants |
| (2) | Bacteria | Fungi |
| (3) | Plants | Fungi |
| (4) | Animals | Plants |
3
Which of the following organisms reproduces by spores?
(1) Fern
(2) Hibiscus plant
(3) Butterfly
(4) Chicken
4
The diagram below shows a flowering plant.
<image_placeholder> id: Q4-fig1 type: diagram linked_question: Q4 description: A labelled diagram of a flowering plant showing root, stem, leaves, flower (with petals, stamen, pistil), and fruit with seeds. labels: Root, Stem, Leaves, Flower, Petal, Stamen (anther, filament), Pistil (stigma, style, ovary), Fruit, Seed values: None must_show: Clear labels for all reproductive parts (stamen, pistil, ovary, stigma, anther) and vegetative parts </image_placeholder>
Which part of the plant develops into the fruit after fertilisation?
(1) Ovary
(2) Stigma
(3) Anther
(4) Petal
5
Which of the following shows the correct order of stages in the life cycle of a flowering plant?
(1) Seed → Seedling → Adult plant → Flower → Fruit
(2) Seed → Flower → Seedling → Adult plant → Fruit
(3) Seedling → Seed → Adult plant → Flower → Fruit
(4) Adult plant → Seed → Seedling → Flower → Fruit
6
Study the flowchart below.
<image_placeholder> id: Q6-fig1 type: diagram linked_question: Q6 description: A flowchart with yes/no questions to classify organisms. Start: Does it have chlorophyll? Yes → Group A. No → Does it reproduce by spores? Yes → Group B. No → Group C. labels: Start, Does it have chlorophyll?, Yes, No, Group A, Group B, Group C, Does it reproduce by spores? values: None must_show: Clear flowchart with decision diamonds and three end groups </image_placeholder>
An organism is placed in Group B. Which of the following could it be?
(1) Moss
(2) Mushroom
(3) Balsam plant
(4) Bacteria
7
The diagram below shows the human reproductive system.
<image_placeholder> id: Q7-fig1 type: diagram linked_question: Q7 description: A simplified diagram of the female human reproductive system showing ovary, fallopian tube, uterus (womb), cervix, and vagina. Male system shows testis, sperm duct, penis. labels: Ovary, Fallopian tube, Uterus, Cervix, Vagina, Testis, Sperm duct, Penis values: None must_show: Clear labels for all parts in both male and female systems </image_placeholder>
Where does fertilisation usually take place in the human female reproductive system?
(1) Ovary
(2) Fallopian tube
(3) Uterus
(4) Vagina
8
Which of the following statements about pollination is correct?
(1) Pollination occurs after fertilisation.
(2) Pollination is the fusion of male and female reproductive cells.
(3) Pollination is the transfer of pollen grains from the anther to the stigma.
(4) Pollination only occurs in water plants.
9
Which of the following is not a method of seed dispersal?
(1) By wind
(2) By water
(3) By splitting of fruit
(4) By photosynthesis
10
The diagram below shows a seed.
<image_placeholder> id: Q10-fig1 type: diagram linked_question: Q10 description: A longitudinal section of a bean seed showing seed coat, embryo (radicle, plumule), and cotyledon (seed leaf). labels: Seed coat, Embryo, Radicle, Plumule, Cotyledon (seed leaf) values: None must_show: Clear labels for seed coat, radicle, plumule, and cotyledon </image_placeholder>
What is the function of the cotyledon (seed leaf)?
(1) Protects the embryo
(2) Absorbs water from the soil
(3) Stores food for the developing seedling
(4) Develops into the root
11
Which of the following conditions is not necessary for seed germination?
(1) Water
(2) Air (oxygen)
(3) Sunlight
(4) Suitable temperature
12
Study the table below.
| Organism | Method of Reproduction |
|---|---|
| Bacteria | Binary fission |
| Yeast | Budding |
| Fern | Spores |
| Hydra | Budding |
| Strawberry plant | Runners (vegetative) |
Which of the following pairs of organisms reproduce asexually?
(1) Bacteria and Fern
(2) Yeast and Hydra
(3) Fern and Strawberry plant
(4) Bacteria and Strawberry plant
13
The diagram below shows the life cycle of a mosquito.
<image_placeholder> id: Q13-fig1 type: diagram linked_question: Q13 description: A circular diagram showing four stages of mosquito life cycle: Egg → Larva → Pupa → Adult, with arrows connecting them in a cycle. labels: Egg, Larva, Pupa, Adult, arrows showing direction values: None must_show: Four distinct stages in correct cyclic order with arrows </image_placeholder>
The mosquito undergoes complete metamorphosis. Which stage is the pupa?
(1) The feeding stage
(2) The resting stage where transformation occurs
(3) The egg-laying stage
(4) The stage that lives in water and breathes through a siphon
14
Which of the following animals gives birth to live young?
(1) Frog
(2) Butterfly
(3) Guppy fish
(4) Chicken
15
The diagram below shows a cell.
<image_placeholder> id: Q15-fig1 type: diagram linked_question: Q15 description: A diagram of a plant cell showing cell wall, cell membrane, cytoplasm, nucleus, chloroplast, and large vacuole. labels: Cell wall, Cell membrane, Cytoplasm, Nucleus, Chloroplast, Vacuole values: None must_show: All six organelles clearly labelled </image_placeholder>
Which part of the cell controls all activities in the cell?
(1) Cell wall
(2) Cytoplasm
(3) Nucleus
(4) Vacuole
16
Which of the following is a structural adaptation of a cactus plant to survive in the desert?
(1) It opens its stomata at night.
(2) It has a shallow but widespread root system.
(3) Its stem is modified into a fleshy, green structure that stores water.
(4) It grows quickly after rainfall.
17
Study the food chain below.
Grass → Grasshopper → Frog → Snake → Eagle
If a disease kills most of the grasshoppers, what will most likely happen to the frog population?
(1) Increase
(2) Decrease
(3) Remain the same
(4) Move to another habitat
18
Which of the following shows the correct order of the water cycle processes?
(1) Evaporation → Condensation → Precipitation → Collection
(2) Condensation → Evaporation → Precipitation → Collection
(3) Precipitation → Evaporation → Condensation → Collection
(4) Collection → Evaporation → Condensation → Precipitation
19
Water exists in three states. Which of the following processes involves a change from liquid to gas?
(1) Freezing
(2) Melting
(3) Evaporation
(4) Condensation
20
The diagram below shows the human respiratory system.
<image_placeholder> id: Q20-fig1 type: diagram linked_question: Q20 description: A diagram of the human respiratory system showing nose, trachea, bronchi, lungs, bronchioles, alveoli, and diaphragm. labels: Nose, Trachea, Bronchi, Lungs, Bronchioles, Alveoli, Diaphragm values: None must_show: All parts clearly labelled, especially alveoli and diaphragm </image_placeholder>
Where does gaseous exchange take place in the human respiratory system?
(1) Trachea
(2) Bronchi
(3) Alveoli
(4) Diaphragm
21
Which of the following is a function of the circulatory system?
(1) Breaks down food into simpler substances
(2) Removes waste gases from the body
(3) Transports oxygen and nutrients to all parts of the body
(4) Supports the body and protects organs
22
The diagram below shows a cross-section of the human heart.
<image_placeholder> id: Q22-fig1 type: diagram linked_question: Q22 description: A simplified cross-section of the human heart showing four chambers: right atrium, right ventricle, left atrium, left ventricle. Arrows show blood flow direction. Valves are shown. labels: Right atrium, Right ventricle, Left atrium, Left ventricle, Pulmonary artery, Aorta, Vena cava, Pulmonary vein, Valves values: None must_show: Four chambers clearly labelled, blood flow direction arrows, major blood vessels labelled </image_placeholder>
Which chamber pumps oxygen-rich blood to the rest of the body?
(1) Right atrium
(2) Right ventricle
(3) Left atrium
(4) Left ventricle
23
In plants, which transport tissue carries water and mineral salts from the roots to the leaves?
(1) Phloem
(2) Xylem
(3) Stomata
(4) Root hairs
24
The diagram below shows a simple electrical circuit.
<image_placeholder> id: Q24-fig1 type: diagram linked_question: Q24 description: A circuit diagram showing a battery, a switch (open), two bulbs connected in series, and connecting wires. labels: Battery, Switch (open), Bulb 1, Bulb 2, Connecting wires values: None must_show: Series circuit with two bulbs, open switch, battery with polarity marked </image_placeholder>
The switch is open. What will happen to the bulbs?
(1) Both bulbs will light up.
(2) Only Bulb 1 will light up.
(3) Only Bulb 2 will light up.
(4) Neither bulb will light up.
25
Which of the following materials is a conductor of electricity?
(1) Plastic
(2) Rubber
(3) Copper
(4) Wood
26
Three identical bulbs are connected in a parallel circuit with a battery. If one bulb fuses (blows), what happens to the other two bulbs?
(1) They become brighter.
(2) They become dimmer.
(3) They remain the same brightness.
(4) They also fuse.
27
An electromagnet is made by coiling wire around an iron nail and connecting it to a battery. Which of the following will not increase the strength of the electromagnet?
(1) Increasing the number of coils
(2) Using a thicker wire
(3) Increasing the number of batteries
(4) Using a steel nail instead of an iron nail
28
Which of the following safety practices when using electricity is incorrect?
(1) Do not touch electrical appliances with wet hands.
(2) Do not overload electrical sockets.
(3) Use damaged wires if they are covered with tape.
(4) Switch off appliances when not in use.
SECTION B (44 marks)
Questions 29 to 40 carry the marks shown.
29
The diagram below shows three organisms: A, B, and C.
<image_placeholder> id: Q29-fig1 type: diagram linked_question: Q29 description: Three separate diagrams. Organism A: A mushroom with cap, gills, and stem. Organism B: A fern plant with fronds and spores on underside. Organism C: A balsam plant with flowers, leaves, stem, and roots. labels: Organism A: Mushroom (cap, gills, stem). Organism B: Fern (frond, spores, rhizome, roots). Organism C: Balsam plant (flower, leaf, stem, root) values: None must_show: Clear distinguishing features of each organism type </image_placeholder>
(a) Classify the three organisms into two groups based on how they obtain food. Give a heading for each group. [2]
Group 1: ___________________________________
Organism(s): _______________________________
Group 2: ___________________________________
Organism(s): _______________________________
(b) State one similarity in reproduction between Organism A and Organism B. [1]
(c) State one difference in reproduction between Organism B and Organism C. [1]
30
The diagram below shows the life cycle of a butterfly.
<image_placeholder> id: Q30-fig1 type: diagram linked_question: Q30 description: A circular diagram showing four stages: Egg → Larva (caterpillar) → Pupa (chrysalis) → Adult butterfly, with arrows in a cycle. labels: Egg, Larva (caterpillar), Pupa (chrysalis), Adult butterfly values: None must_show: Four stages in correct order with arrows, distinct appearance of each stage </image_placeholder>
(a) Name the process that occurs at Stage X (arrow from Pupa to Adult). [1]
(b) The caterpillar moults several times as it grows. Explain why moulting is necessary. [1]
(c) State two differences between the larva and the adult butterfly. [2]
Difference 1: ______________________________________________________________
Difference 2: ______________________________________________________________
(d) How does the butterfly's life cycle benefit the plant it visits as an adult? [1]
31
The diagram below shows the reproductive parts of a flower.
<image_placeholder> id: Q31-fig1 type: diagram linked_question: Q31 description: A longitudinal section of a flower showing sepal, petal, stamen (anther on filament), pistil (stigma, style, ovary with ovules inside), and receptacle. labels: Sepal, Petal, Anther, Filament, Stigma, Style, Ovary, Ovule, Receptacle values: None must_show: All reproductive parts clearly labelled, ovules visible inside ovary </image_placeholder>
(a) On the diagram, label the stigma and anther. [1]
(b) After pollination, a pollen tube grows down the style. What is the function of the pollen tube? [1]
(c) The ovule develops into a _______________ after fertilisation. [1]
(d) The ovary develops into a _______________ after fertilisation. [1]
(e) Some flowers are brightly coloured and have nectar. Explain how this helps in pollination. [1]
32
Jenny conducted an experiment to find out the conditions needed for seed germination. She set up four set-ups as shown below.
<image_placeholder> id: Q32-fig1 type: diagram linked_question: Q32 description: Four set-ups labelled A, B, C, D. Each has 5 bean seeds on cotton wool in a petri dish. Set-up A: Wet cotton wool, room temperature, with air. Set-up B: Dry cotton wool, room temperature, with air. Set-up C: Wet cotton wool, in freezer (0°C), with air. Set-up D: Wet cotton wool, room temperature, in vacuum-sealed container (no air). labels: Set-up A (Water + Air + Suitable temp), Set-up B (No water + Air + Suitable temp), Set-up C (Water + Air + Low temp), Set-up D (Water + No air + Suitable temp) values: None must_show: Clear labels for each set-up showing presence/absence of water, air, and temperature condition </image_placeholder>
(a) In which set-up(s) will the seeds germinate? [1]
(b) What is the aim of Jenny's experiment? [1]
(c) Which two set-ups should Jenny compare to show that water is needed for germination? [1]
(d) Which two set-ups should Jenny compare to show that air (oxygen) is needed for germination? [1]
(e) The seeds in Set-up C did not germinate. Explain why. [1]
33
The diagram below shows the human digestive system.
<image_placeholder> id: Q33-fig1 type: diagram linked_question: Q33 description: A diagram of the human digestive system showing mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus, liver, pancreas, gall bladder. labels: Mouth, Oesophagus, Stomach, Small intestine, Large intestine, Rectum, Anus, Liver, Pancreas, Gall bladder values: None must_show: All organs clearly labelled, especially small intestine and large intestine </image_placeholder>
(a) In which organ does most digestion of food take place? [1]
(b) In which organ is most water absorbed from undigested food? [1]
(c) State the function of the small intestine in digestion. [1]
(d) The liver produces bile. State the function of bile in digestion. [1]
34
The diagram below shows a cross-section of a stem.
<image_placeholder> id: Q34-fig1 type: diagram linked_question: Q34 description: A cross-section of a dicot stem showing epidermis, cortex, vascular bundles (xylem and phloem), and pith. Xylem and phloem are labelled within vascular bundle. labels: Epidermis, Cortex, Vascular bundle, Xylem, Phloem, Pith values: None must_show: Clear distinction between xylem and phloem positions in vascular bundle </image_placeholder>
(a) Name the transport tissue labelled X (xylem) and Y (phloem). [1]
X: ________________________
Y: ________________________
(b) What substance does tissue X transport? [1]
(c) What substance does tissue Y transport? [1]
(d) A ring of bark (including phloem) is removed from a tree trunk. Explain why the tree will eventually die. [2]
35
The diagram below shows the water cycle.
<image_placeholder> id: Q35-fig1 type: diagram linked_question: Q35 description: A landscape diagram showing sun, ocean, evaporation (arrows up), condensation (clouds), precipitation (rain), surface runoff, groundwater, and transpiration from plants. labels: Sun, Ocean, Evaporation, Transpiration, Condensation, Clouds, Precipitation, Surface runoff, Groundwater values: None must_show: All processes labelled with arrows showing direction of water movement </image_placeholder>
(a) Name the process at A (water vapour rising from ocean). [1]
(b) Name the process at B (water vapour turning into water droplets in clouds). [1]
(c) Explain how deforestation (cutting down trees) can affect the water cycle. [2]
(d) State one way to conserve water at home. [1]
36
The diagram below shows the human circulatory system.
<image_placeholder> id: Q36-fig1 type: diagram linked_question: Q36 description: A simplified diagram showing heart, lungs, and body. Arrows show deoxygenated blood (blue) going from heart to lungs, oxygenated blood (red) from lungs to heart to body, and deoxygenated blood from body back to heart. labels: Heart, Lungs, Body, Oxygenated blood (red arrows), Deoxygenated blood (blue arrows) values: None must_show: Clear double circulation path with colour-coded arrows </image_placeholder>
(a) The blood in the pulmonary artery is _______________ (oxygenated / deoxygenated). [1]
(b) The blood in the pulmonary vein is _______________ (oxygenated / deoxygenated). [1]
(c) Explain why the heart is described as a double pump. [2]
(d) During exercise, the heart beats faster. Explain why this is necessary. [1]
37
Ali set up an electrical circuit as shown below.
<image_placeholder> id: Q37-fig1 type: diagram linked_question: Q37 description: A circuit diagram with a battery, a switch, three bulbs (B1, B2, B3). B1 is in series with a parallel combination of B2 and B3. labels: Battery, Switch, B1, B2, B3, Connecting wires values: None must_show: Clear series-parallel arrangement: B1 in main path, B2 and B3 on parallel branches </image_placeholder>
(a) Is this a series or parallel circuit? [1]
(b) If the switch is closed and all bulbs are working, compare the brightness of B1, B2, and B3. [2]
(c) If bulb B2 fuses, what happens to bulb B1 and bulb B3? [1]
B1: ______________________________________________________________________
B3: ______________________________________________________________________
(d) State one advantage of connecting bulbs in parallel in household lighting. [1]
38
The table below shows the electrical conductivity of four materials.
| Material | Conducts Electricity? |
|---|---|
| Copper wire | Yes |
| Plastic ruler | No |
| Water (distilled) | No |
| Water (with salt dissolved) | Yes |
(a) Based on the table, classify the materials into conductors and insulators. [2]
Conductors: _______________________________________________________________
Insulators: _______________________________________________________________
(b) Why is distilled water a poor conductor of electricity? [1]
(c) Why does water with dissolved salt conduct electricity? [1]
(d) Electrical wires are made of copper but covered with plastic. Explain why. [1]
39
Mei Ling wants to make an electromagnet. She has an iron nail, copper wire, and a battery.
(a) Draw a labelled diagram to show how she should set up the electromagnet. [2]
<image_placeholder> id: Q39-fig1 type: experimental_setup linked_question: Q39 description: An empty space for student to draw. Expected drawing: Iron nail with insulated copper wire coiled around it, ends of wire connected to battery terminals (+ and -), switch optional. labels: Iron nail, Copper wire (coiled), Battery (+ and - terminals), Connecting wires, Switch (optional) values: None must_show: Coiled wire around nail, correct battery connection, direction of current implied </image_placeholder>
(b) State two ways to increase the strength of the electromagnet. [2]
(c) Mei Ling replaces the iron nail with a steel nail. The electromagnet becomes weaker. Explain why. [1]
40
The diagram below shows a food web in a garden community.
<image_placeholder> id: Q40-fig1 type: diagram linked_question: Q40 description: A food web with: Grass and Plants (producers) → Grasshopper, Caterpillar, Aphid (herbivores) → Frog, Spider, Ladybird (carnivores/omnivores) → Snake, Bird (top predators). Decomposers: Bacteria, Fungi breaking down all dead organisms. labels: Grass, Plants, Grasshopper, Caterpillar, Aphid, Frog, Spider, Ladybird, Snake, Bird, Bacteria, Fungi values: None must_show: Clear arrows showing energy flow, at least 3 trophic levels, decomposers shown </image_placeholder>
(a) Name one producer in the food web. [1]
(b) Name one food chain with four organisms from the food web. [1]
(c) If all the frogs are removed from the community, how will the population of grasshoppers change? Explain your answer. [2]
(d) State the role of decomposers (bacteria and fungi) in the food web. [1]
END OF PAPER
Answers
TuitionGoWhere Practice Paper - Science Primary 5 (Answer Key)
Subject: Science
Level: Primary 5
Paper: Practice Paper 2 (Version 2 of 5)
Total Marks: 100
SECTION A (56 marks)
1
Answer: (2)
Explanation: All living things need air (oxygen for respiration), food (for energy and growth), and water (for life processes) to survive.
- (1) is incorrect: Not all living things lay eggs (e.g., mammals give birth to live young).
- (3) is incorrect: Only plants (producers) make their own food; animals and fungi cannot.
- (4) is incorrect: Plants are living things but do not move from place to place.
2
Answer: (1)
Explanation: Group X shows Mushroom, Yeast, Mould — these are fungi (reproduce by spores, no chlorophyll). Group Y shows Rose plant, Oak tree, Grass — these are plants (have chlorophyll, make food by photosynthesis).
3
Answer: (1)
Explanation: Ferns are non-flowering plants that reproduce by spores (found on the underside of fronds). Hibiscus reproduces by seeds, butterfly by eggs/larvae, chicken by eggs.
4
Answer: (1)
Explanation: After fertilisation, the ovary develops into the fruit, while the ovules inside develop into seeds. The stigma receives pollen, the anther produces pollen, and petals attract pollinators.
5
Answer: (1)
Explanation: Correct sequence: Seed → germinates into Seedling → grows into Adult plant → produces Flower → after pollination and fertilisation, develops Fruit (containing seeds).
6
Answer: (2)
Explanation: Group B: "No chlorophyll" AND "Reproduces by spores" → Mushroom (fungus). Moss has chlorophyll (is a plant), Balsam plant has chlorophyll, Bacteria reproduce by binary fission.
7
Answer: (2)
Explanation: Fertilisation (fusion of sperm and egg) usually occurs in the fallopian tube (oviduct). The fertilised egg then moves to the uterus for implantation and development.
8
Answer: (3)
Explanation: Pollination is the transfer of pollen grains from the anther (male part) to the stigma (female part). It occurs before fertilisation. Fusion of reproductive cells is fertilisation, not pollination.
9
Answer: (4)
Explanation: Photosynthesis is the process by which plants make food — it is not a method of seed dispersal. Wind, water, and splitting/explosive action of fruits are all seed dispersal methods.
10
Answer: (3)
Explanation: The cotyledon (seed leaf) stores food (starch, proteins, oils) for the developing seedling until it can photosynthesise. The seed coat protects the embryo; the radicle develops into the root.
11
Answer: (3)
Explanation: Seed germination requires water (activates enzymes), air/oxygen (for respiration), and suitable temperature (for enzyme activity). Sunlight is not needed for germination (seeds germinate underground in darkness); it is needed later for photosynthesis.
12
Answer: (2)
Explanation: Yeast (budding) and Hydra (budding) both reproduce asexually. Bacteria (binary fission) and Strawberry plant (runners) also reproduce asexually, but they are not paired together in the options. Fern reproduces by spores (sexual reproduction involving gametes).
13
Answer: (2)
Explanation: The pupa is the resting stage where the larva undergoes complete transformation (metamorphosis) into the adult. The larva is the feeding stage; the adult lays eggs; the larva lives in water and breathes through a siphon.
14
Answer: (3)
Explanation: Guppy fish are live-bearers (give birth to live young). Frogs lay eggs in water, butterflies lay eggs on leaves, chickens lay eggs.
15
Answer: (3)
Explanation: The nucleus contains genetic material (DNA) and controls all cell activities. Cell wall provides support; cytoplasm is where chemical reactions occur; vacuole stores substances.
16
Answer: (3)
Explanation: A structural adaptation is a physical feature. The cactus stem modified into a fleshy, green, water-storing structure is a structural adaptation. (1) and (4) are behavioural adaptations; (2) is a root adaptation but the stem modification is the most distinctive.
17
Answer: (2)
Explanation: Grasshoppers are the food source for frogs. If grasshoppers decrease, frogs have less food → frog population will decrease.
18
Answer: (1)
Explanation: Correct water cycle order: Evaporation (liquid → gas) → Condensation (gas → liquid droplets in clouds) → Precipitation (rain/snow) → Collection (in water bodies/groundwater).
19
Answer: (3)
Explanation: Evaporation is the change from liquid to gas (at any temperature). Freezing: liquid → solid. Melting: solid → liquid. Condensation: gas → liquid.
20
Answer: (3)
Explanation: Gaseous exchange (oxygen into blood, carbon dioxide out) occurs in the alveoli (air sacs) where the walls are one cell thick and surrounded by capillaries. Trachea and bronchi are air passages; diaphragm is a muscle for breathing.
21
Answer: (3)
Explanation: The circulatory system (heart, blood, blood vessels) transports oxygen and nutrients to all cells and removes waste (carbon dioxide, urea). (1) is digestive system; (2) is respiratory/excretory; (4) is skeletal system.
22
Answer: (4)
Explanation: The left ventricle receives oxygen-rich blood from the left atrium and pumps it through the aorta to the rest of the body. Right side pumps deoxygenated blood to lungs.
23
Answer: (2)
Explanation: Xylem transports water and mineral salts from roots to leaves (one-way, upward). Phloem transports food (sugar) from leaves to all parts. Stomata are pores for gas exchange; root hairs absorb water.
24
Answer: (4)
Explanation: An open switch creates a gap in the circuit → open circuit → no current flows → neither bulb lights up. In a series circuit, all components must be connected for current to flow.
25
Answer: (3)
Explanation: Copper is a metal and a good conductor of electricity. Plastic, rubber, and wood are insulators (do not conduct electricity).
26
Answer: (3)
Explanation: In a parallel circuit, each bulb has its own path to the battery. If one bulb fuses, the circuit for the other bulbs is unaffected → they remain the same brightness.
27
Answer: (4)
Explanation: Iron is a soft magnetic material — it magnetises easily but loses magnetism quickly when current is off (ideal for electromagnets). Steel is a hard magnetic material — it retains magnetism (permanent magnet) but is harder to magnetise/demagnetise, making a weaker electromagnet. Increasing coils, current (more batteries), or using thicker wire (less resistance, more current) all increase strength.
28
Answer: (3)
Explanation: Damaged wires are unsafe even if covered with tape — tape can peel off, exposing live wires. They must be replaced. (1), (2), and (4) are correct safety practices.
SECTION B (44 marks)
29
(a) [2 marks]
Group 1: Decomposers / Fungi (Obtain food by decomposing dead/decaying matter)
Organism(s): A (Mushroom)
Group 2: Producers / Plants (Make their own food by photosynthesis)
Organism(s): B (Fern), C (Balsam plant)
Marking: 1 mark for correct headings, 1 mark for correct organisms in each group.
(b) [1 mark]
Both reproduce by spores.
Accept: Both do not produce seeds / Both do not have flowers.
(c) [1 mark]
Fern (B) reproduces by spores / does not produce seeds.
Balsam plant (C) reproduces by seeds (flowering plant).
Accept: Fern has no flowers; Balsam plant has flowers.
30
(a) [1 mark]
Metamorphosis (or emergence / eclosion)
(b) [1 mark]
The caterpillar's exoskeleton (cuticle) does not stretch/grow, so it must shed the old skin (moult) to allow its body to grow larger.
(c) [2 marks]
Difference 1: Larva (caterpillar) has a long, cylindrical body with many legs (prolegs); Adult butterfly has three body parts (head, thorax, abdomen), six legs, and two pairs of wings.
Difference 2: Larva **feeds on leaves
<stage5_exam_answers_md>
TuitionGoWhere Practice Paper - Science Primary 5 (Answer Key)
Paper: Practice Paper 2 (Version 2 of 5)
Subject: Science
Level: Primary 5
Total Marks: 100
SECTION A (56 marks)
| Question | Answer | Explanation |
|---|---|---|
| 1 | (2) | All living things need air, food, and water to survive. Not all lay eggs (mammals give live birth), not all make their own food (only plants), not all move from place to place (plants are stationary). |
| 2 | (1) | Group X (Mushroom, Yeast, Mould) are Fungi. Group Y (Rose plant, Oak tree, Grass) are Plants. |
| 3 | (1) | Ferns reproduce by spores. Hibiscus reproduces by seeds, butterfly by eggs (complete metamorphosis), chicken by eggs. |
| 4 | (1) | The ovary develops into the fruit after fertilisation. The ovules inside become seeds. |
| 5 | (1) | Correct sequence: Seed → Seedling → Adult plant → Flower → Fruit (→ Seed). |
| 6 | (2) | Group B: No chlorophyll, reproduces by spores → Mushroom (fungus). Moss has chlorophyll. Balsam plant has chlorophyll. Bacteria reproduce by binary fission. |
| 7 | (2) | Fertilisation usually occurs in the fallopian tube. |
| 8 | (3) | Pollination is the transfer of pollen grains from anther to stigma. It occurs before fertilisation. |
| 9 | (4) | Photosynthesis is food-making, not seed dispersal. Wind, water, splitting fruit are dispersal methods. |
| 10 | (3) | Cotyledon stores food for the developing seedling. Seed coat protects. Radicle develops into root. |
| 11 | (3) | Sunlight is not needed for germination (needed later for photosynthesis). Water, air (oxygen), suitable temperature are needed. |
| 12 | (2) | Yeast (budding) and Hydra (budding) reproduce asexually. Bacteria (binary fission) and Strawberry (runners) also asexual, but option (2) is the only pair where both are listed correctly together. Fern reproduces by spores (asexual) but paired with Bacteria in (1) and Strawberry in (3). Option (2) is the clearest correct pair. |
| 13 | (2) | Pupa is the resting stage where transformation (metamorphosis) occurs. Larva is feeding stage. Adult lays eggs. Larva lives in water with siphon. |
| 14 | (3) | Guppy fish gives birth to live young (viviparous). Frog lays eggs, butterfly lays eggs, chicken lays eggs. |
| 15 | (3) | Nucleus controls all cell activities. |
| 16 | (3) | Fleshy green stem storing water is a structural adaptation. Opening stomata at night is behavioural/physiological. Shallow roots is structural but stem modification is more iconic. |
| 17 | (2) | Frogs eat grasshoppers. Less food → frog population decreases. |
| 18 | (1) | Correct water cycle order: Evaporation → Condensation → Precipitation → Collection. |
| 19 | (3) | Evaporation is liquid to gas. Freezing: liquid to solid. Melting: solid to liquid. Condensation: gas to liquid. |
| 20 | (3) | Gaseous exchange occurs in alveoli (air sacs). |
| 21 | (3) | Circulatory system transports oxygen and nutrients. Digestive system breaks down food. Respiratory system removes waste gases. Skeletal system supports/protects. |
| 22 | (4) | Left ventricle pumps oxygen-rich blood to body via aorta. Right side handles deoxygenated blood. |
| 23 | (2) | Xylem carries water and minerals from roots to leaves. Phloem carries food. |
| 24 | (4) | Open switch = incomplete circuit = no current flows = neither bulb lights up. |
| 25 | (3) | Copper is a metal, good conductor. Plastic, rubber, wood are insulators. |
| 26 | (3) | In parallel circuit, each bulb has own path. One fusing doesn't affect others' brightness (voltage across each remains same). |
| 27 | (4) | Steel retains magnetism (hard magnetic material), iron loses it easily (soft magnetic material) - better for electromagnet. More coils, more batteries (higher voltage/current), thicker wire (less resistance, more current) all increase strength. |
| 28 | (3) | Damaged wires should be replaced, not taped. Tape is not a safe permanent repair. |
SECTION B (44 marks)
29
(a) [2 marks]
- Group 1: Decomposers / Fungi (Obtain food by decomposing dead matter)
Organism(s): A (Mushroom) - Group 2: Plants (Make their own food by photosynthesis)
Organism(s): B (Fern) and C (Balsam plant)
(b) [1 mark]
Both reproduce by spores.
(c) [1 mark]
Organism B (Fern) reproduces by spores, while Organism C (Balsam plant) reproduces by seeds (flowering plant).
OR: Fern does not produce flowers/fruits; Balsam plant produces flowers and fruits.
30
(a) [1 mark]
Emergence (or Eclosion / Adult emergence from pupa).
(b) [1 mark]
The caterpillar's exoskeleton (cuticle) does not stretch/grow, so it must moult to allow its body to increase in size.
(c) [2 marks]
Difference 1: Larva (caterpillar) has a long, cylindrical body with many legs (prolegs); Adult butterfly has three distinct body parts (head, thorax, abdomen) with six jointed legs and two pairs of wings.
Difference 2: Larva feeds on leaves (chewing mouthparts); Adult feeds on nectar (siphoning proboscis).
Other valid differences: Larva crawls; Adult flies. Larva has simple eyes; Adult has compound eyes.
(d) [1 mark]
The adult butterfly pollinates the flowers while feeding on nectar, allowing the plant to undergo fertilisation and produce seeds/fruits.
31
(a) [1 mark]
Labels on diagram:
- Stigma → Top of pistil (sticky surface)
- Anther → Top of stamen (pollen-producing sac)
(b) [1 mark]
The pollen tube carries the male reproductive cells (sperm nuclei) from the stigma down the style to the ovule in the ovary for fertilisation.
(c) [1 mark]
Seed
(d) [1 mark]
Fruit
(e) [1 mark]
Bright colours and nectar attract pollinators (insects/birds) which transfer pollen from anther to stigma during their visit.
32
(a) [1 mark]
Set-up A (Wet cotton wool, room temperature, with air) — Has water, air, and suitable temperature.
(b) [1 mark]
Set-up B (Dry cotton wool) — Seeds need water to germinate. Without water, the seed remains dormant; enzymes are not activated to break down stored food.
(c) [1 mark]
Set-up C (In refrigerator / low temperature) — Temperature is too low (unsuitable). Enzyme activity is slowed/stopped, so germination does not occur.
(d) [1 mark]
Set-up D (Boiled water + oil layer / no air) — Oil layer prevents oxygen from dissolving in water / seeds deprived of air (oxygen). Oxygen is needed for respiration to release energy for growth.
33
(a) [1 mark]
Carbon dioxide
(b) [1 mark]
Oxygen
(c) [1 mark]
Stomata (on the underside of leaves)
(d) [1 mark]
The plastic bag traps water vapour transpired by the leaves, causing condensation on the inner surface. This shows that plants lose water vapour through their leaves (transpiration).
34
(a) [1 mark]
Xylem (Water-carrying tubes)
(b) [1 mark]
The red-coloured water is transported up the stem by the xylem to the flower petals, staining them red. This shows xylem transports water.
(c) [1 mark]
The stem/leaves remain green/white (uncoloured) because phloem transports food (sugar), not water, and the dye was in the water.
35
(a) [1 mark]
Inhale / Inhalation (Diaphragm contracts and moves down, rib cage moves up and out, chest volume increases, air rushes in).
(b) [1 mark]
Exhale / Exhalation (Diaphragm relaxes and moves up, rib cage moves down and in, chest volume decreases, air is pushed out).
(c) [1 mark]
Alveoli (Air sacs)
(d) [1 mark]
Alveoli have thin walls (one cell thick), a large surface area, and are surrounded by a dense network of blood capillaries, allowing rapid diffusion of gases.
36
(a) [1 mark]
Left ventricle → Aorta → Body (Systemic circulation)
Path: Left ventricle pumps oxygen-rich blood into aorta to reach all parts of the body.
(b) [1 mark]
Valves (prevent backflow of blood)
(c) [1 mark]
The left ventricle wall is thicker/more muscular than the right ventricle wall because it needs to pump blood at high pressure to the whole body, while the right ventricle only pumps to the nearby lungs.
(d) [1 mark]
Pulmonary artery (carries deoxygenated blood from right ventricle to lungs)
37
(a) [1 mark]
Bulbs in Circuit A are brighter (or Circuit B bulbs are dimmer).
(b) [1 mark]
In series (Circuit A), each bulb gets the full voltage of the battery (if identical bulbs, voltage splits but current same; actually for identical bulbs in series vs parallel: In series, total resistance higher, current lower, bulbs dimmer. In parallel, each bulb gets full voltage, brighter. Wait. Standard P5 knowledge: Parallel circuit bulbs are brighter than series circuit bulbs (given same battery). So Circuit B (parallel) bulbs are brighter. Circuit A (series) bulbs are dimmer. Let me correct.)
Correction for standard P5 curriculum:
- Circuit A: Series → Bulbs are dimmer. Current same, voltage splits. Total resistance high.
- Circuit B: Parallel → Bulbs are brighter. Each gets full voltage. Total resistance lower, more current from battery.
Answer (a): Bulbs in Circuit B are brighter. (1 mark)
(b) [1 mark]
In Circuit B (parallel), each bulb receives the full voltage of the battery / current through each bulb is larger compared to Circuit A (series) where voltage is shared / total resistance is higher so current is smaller.
(c) [1 mark]
Circuit B (Parallel). In a parallel circuit, each bulb has its own path; if one fuses, the circuit for the other bulb remains complete.
38
(a) [1 mark]
Iron (or Steel - but iron is better for temporary magnet/electromagnet core). Answer: Iron rod/nail.
(b) [1 mark]
Increase the number of coils of wire around the rod.
OR: Increase the number of batteries (voltage/current).
OR: Use a thicker wire (less resistance, more current).
(c) [1 mark]
Steel retains its magnetism (becomes a permanent magnet), while iron loses its magnetism easily when the current is switched off. Iron is a soft magnetic material; steel is a hard magnetic material. For an electromagnet, we want it to turn on/off, so iron is preferred.
(d) [1 mark]
The compass needle will deflect (move). The electric current in the wire creates a magnetic field around it, which interacts with the magnetic field of the compass needle.
39
(a) [1 mark]
Solid (Ice) → Liquid (Water) → Gas (Steam/Water vapour)
(b) [1 mark]
Melting (Ice to water) and Boiling/Evaporation (Water to steam).
Processes: Melting → Boiling.
(c) [1 mark]
Temperature remains constant at 0°C during melting and 100°C during boiling.
Heat energy is used to overcome forces of attraction between particles (latent heat), not to increase kinetic energy/temperature.
(d) [1 mark]
Evaporation occurs at any temperature (below boiling point), only at the surface, and slowly.
Boiling occurs at a fixed temperature (100°C), throughout the liquid (bubbles), and rapidly.
40
(a) [1 mark]
Conductor of electricity (Metal allows current to flow, completing the circuit, bulb lights up).
(b) [1 mark]
Insulator of electricity (Plastic/Rubber does not allow current to flow, circuit open, bulb does not light up).
(c) [1 mark]
Material X: Copper / Aluminium / Metal (Good conductor)
Material Y: Plastic / Rubber / Glass / Wood (Good insulator)
(d) [1 mark]
Safety: The metal parts (conductors) carry electricity; the plastic/rubber covering (insulator) prevents the user from getting an electric shock by covering the live wires.
End of Answer Key