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Primary 6 PSLE Science Life Cycles Quiz

Free P6 PSLE Science Life Cycles quiz, HY3 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.

Primary 6 PSLE Science AI Generated Generated by Tencent HY3 Free Updated 2026-08-17

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Questions

Primary 6 PSLE Science Quiz - Life Cycles

Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: ___________ / 40

Duration: 50 minutes
Total Marks: 40

Instructions:

This quiz has 20 questions on the topic of Life Cycles.
Section A: 10 multiple-choice questions (1 mark each).
Section B: 6 short-answer questions (2 marks each).
Section C: 4 structured questions with subparts (total 3–4 marks each).
Write your answers clearly in the spaces provided.
This is syllabus-first practice content generated from LLM-inferred templates. It is NOT derived from past-year PSLE papers.

Section A (1 mark each, 1–10)

The life cycle of a butterfly starts from an egg and goes through several stages. Which of the following shows the correct order?
A) Egg → Pupa → Larva → Adult
B) Egg → Larva → Pupa → Adult
C) Larva → Egg → Pupa → Adult
D) Pupa → Egg → Larva → Adult
Answer: ______
A frog undergoes metamorphosis. Which stage comes immediately after the egg?
A) Tadpole
B) Adult frog
C) Tadpole with legs
D) Froglet
Answer: ______
Which of the following animals does NOT go through a pupa stage?
A) Butterfly
B) Mosquito
C) Hen
D) Beetle
Answer: ______
The diagram below shows the life cycle of a mosquito.

Diagram for Q4 (P6 Science)

Generated diagram for Q4.

Which stage is spent entirely in water and looks like a small wriggling worm?
A) Egg
B) Larva
C) Pupa
D) Adult
Answer: ______

A chicken grows from an egg into an adult without changing body form drastically. This type of life cycle is called:
A) Complete metamorphosis
B) Incomplete metamorphosis
C) Direct development
D) Metamorphosis
Answer: ______
Which of the following is a plant that reproduces using spores?
A) Rose
B) Fern
C) Mango tree
D) Grass
Answer: ______
The life cycle of a human being includes the stages: baby, child, teenager, adult. Which of the following is also a stage?
A) Pupa
B) Tadpole
C) Old person
D) Larva
Answer: ______
A bean seed is planted and grows into a new plant. This is an example of reproduction by:
A) Spores
B) Seeds
C) Budding
D) Fragmentation
Answer: ______
Which insect below goes through incomplete metamorphosis (egg, nymph, adult)?
A) Butterfly
B) Dragonfly
C) Bee
D) Fly
Answer: ______
Why do living things go through life cycles?
A) To look different
B) To grow, develop, and produce offspring
C) To avoid predators
D) To eat more food
Answer: ______

Section B (2 marks each, 11–16)

State two differences between the life cycle of a butterfly and the life cycle of a chicken.

Explain what metamorphosis means in the life cycle of an insect.

Name one animal that reproduces by laying eggs and one animal that gives birth to live young.
Egg-laying: ___________________
Live birth: ___________________
The diagram shows a fern plant with small dots under its leaves.

Diagram for Q14 (P6 Science)

Generated diagram for Q14.

What are the dots, and how do they help the fern reproduce?

A tadpole lives in water and breathes using gills. An adult frog breathes using lungs and skin. Explain why this change is important for the frog's life cycle.

List two things a living thing needs to do during its life cycle to ensure its kind continues.

Section C (17–20, structured)

The life cycle of a butterfly is shown below.
Egg → Larva (caterpillar) → Pupa → Adult
(a) What does the larva (caterpillar) mainly do after hatching? (1 mark)

(b) Why is the pupa stage important? (2 marks)

Study the life cycle of a frog below.

Diagram for Q18 (P6 Science)

Generated diagram for Q18.

(a) Name the stage where the frog develops front and hind legs but still has a tail. (1 mark)

(b) Describe one change in how it gets oxygen from the tadpole stage to the adult stage. (2 marks)

A student says: "All animals with life cycles lay eggs."
(a) Is the student correct? Give a reason. (1 mark)

(b) Give one example of an animal with a life cycle that does NOT lay eggs and state how its young are produced. (2 marks)

Plants also have life cycles.
(a) Name two ways plants can reproduce to form new plants. (2 marks)

(b) Explain why reproduction is an important part of a plant's life cycle. (2 marks)

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Answers

Primary 6 PSLE Science Quiz - Life Cycles (Answer Key)

Total Marks: 40
Topic: Life Cycles (syllabus-first, LLM-inferred; not past-year derived)

Section A Answers (1 mark each)

B (Egg → Larva → Pupa → Adult)
Teaching note: Butterflies go through complete metamorphosis. The larva is the caterpillar, then it forms a pupa (chrysalis), and finally emerges as an adult. Option A swaps larva and pupa.
A (Tadpole)
Teaching note: Frog eggs hatch into tadpoles in water. The tadpole then grows legs and becomes a froglet before adult.
C (Hen)
Teaching note: Hen is a bird and develops directly from egg to chick without a pupa stage. Butterfly, mosquito, beetle are insects with pupa stage.
B (Larva)
Teaching note: From the diagram, the larva is the stage after egg, shown in water as a wriggling worm-like form. Pupa is also in water but does not wriggle like a worm.
C (Direct development)
Teaching note: Chicken grows from egg to adult with same basic body plan (no pupa, no drastic change). Not metamorphosis.
B (Fern)
Teaching note: Ferns reproduce by spores found under leaves, not by seeds like flowering plants.
C (Old person)
Teaching note: Human life cycle stages include baby, child, teenager, adult, and old person. Pupa/tadpole/larva are insect/amphibian stages.
B (Seeds)
Teaching note: Bean is a seed plant; the seed grows into a new plant. Spores (ferns), budding (yeast), fragmentation (some worms) are other methods.
B (Dragonfly)
Teaching note: Dragonfly has incomplete metamorphosis: egg → nymph → adult. Butterfly/bee/fly have complete metamorphosis with pupa.
B (To grow, develop, and produce offspring)
Teaching note: Life cycles ensure survival of the species by growth and reproduction.

Section B Answers (2 marks each)

Differences (any two correct):

Butterfly goes through complete metamorphosis (egg, larva, pupa, adult); chicken has direct development (egg, chick, adult).
Butterfly has a pupa stage; chicken does not.
Butterfly larva looks very different from adult; chicken chick looks like small adult.
Marking: 1 mark per correct difference.

Metamorphosis means the animal changes its body form greatly during its life cycle (1 mark). In insects, it includes stages like larva and pupa before becoming adult (1 mark).
Teaching note: Example: caterpillar to butterfly.
Egg-laying: Hen / Turtle / Fish (any correct, 1 mark)
Live birth: Cow / Cat / Human (any correct, 1 mark)
The dots are sporangia (or spore cases) (1 mark). They produce and release spores which grow into new fern plants (1 mark).
Teaching note: Spores are tiny cells that can grow into new individuals without joining with another cell.
The change lets the frog live on land as an adult (1 mark) because lungs and skin can take in oxygen from air, while gills only work in water (1 mark).
Teaching note: This supports the shift from aquatic tadpole to terrestrial adult.
Any two: reproduce (have offspring), grow, find food, avoid danger (2 marks, 1 each).
Common mistake: Saying "play" or "sleep" – not directly ensuring continuation.

Section C Answers

(a) Eats and grows (or feeds continuously) (1 mark).
(b) Pupa stage is where the caterpillar's body is reorganised into the adult butterfly (1 mark); it does not feed and changes form completely (1 mark).
Marking descriptors: 1 mark for "change/transform", 1 mark for "no feeding / resting / reorganisation".
(a) Tadpole with front and hind legs (or froglet if tail still present – accept "tadpole with legs") (1 mark).
(b) Tadpole uses gills to breathe in water (1 mark); adult uses lungs and skin to breathe air on land (1 mark).
From image: Diagram shows water stages then land stages.
(a) No (1 mark). Reason: Some animals like humans and cows give birth to live young.
(b) Example: Human / Cow / Dog (1 mark) gives birth to live young (1 mark).
Teaching note: Live birth means baby develops inside mother and is born alive.
(a) By seeds and by spores (or cuttings/budding) (2 marks, 1 each).
(b) Reproduction makes new plants so the species does not die out (1 mark); it continues the life cycle (1 mark).
Teaching note: Without reproduction, the plant kind would disappear.