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Primary 6 PSLE Science Life Cycles Quiz

Free P6 PSLE Science Life Cycles quiz, HY3 Exam version, with questions, answers, and PSLE-focused practice for Singapore students.

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Primary 6 PSLE Science From Real Exams Generated by Tencent HY3 Free Updated 2026-07-10

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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 8 marks).
Write your answers clearly in the spaces provided.

Section A (1 mark each, 10 marks)

Which of the following animals goes through a complete metamorphosis?
A) Chicken
B) Butterfly
C) Mouse
D) Fish

Answer: ___________
The life cycle of a mosquito includes the stage of ________.
A) pupa
B) calf
C) chick
D) larva only

Answer: ___________
A frog's life cycle has which of these stages?
A) Egg → tadpole → adult
B) Egg → nymph → adult
C) Egg → cub → adult
D) Egg → kitten → adult

Answer: ___________
Which plant reproduces using a bulb?
A) Rose
B) Onion
C) Mango
D) Sunflower

Answer: ___________
The process by which a chick develops inside an egg is called ________.
A) metamorphosis
B) germination
C) incubation
D) pollination

Answer: ___________
Which of these is NOT a stage in the life cycle of a butterfly?
A) Egg
B) Caterpillar
C) Cocoon
D) Calf

Answer: ___________
A bean plant grows from a ________.
A) spore
B) seed
C) bulb
D) leaf

Answer: ___________
The young one of a cow is called a ________.
A) calf
B) cub
C) kitten
D) chick

Answer: ___________
Which of these animals does NOT go through metamorphosis?
A) Frog
B) Butterfly
C) Dog
D) Mosquito

Answer: ___________
Plants that reproduce from runners include ________.
A) pineapple
B) strawberry
C) papaya
D) coconut

Answer: ___________

Section B (2 marks each, 12 marks)

Name the stage in a butterfly's life cycle after the caterpillar.
Answer: _______________________________________
State one difference between the life cycle of a chicken and that of a butterfly.
Answer: _______________________________________
How does a potato plant reproduce without seeds?
Answer: _______________________________________
What is metamorphosis? Give one example of an animal that undergoes it.
Answer: _______________________________________
Name two animals that give birth to live young.
Answer: _______________________________________
Why is the egg stage important in the life cycle of a frog?
Answer: _______________________________________

Section C (8 marks total)

(a) List the four stages of the life cycle of a butterfly. (2 marks)
Answer: _______________________________________

(b) Explain why the caterpillar stage is needed. (1 mark)
Answer: _______________________________________

(a) Name one plant that reproduces from a bulb and one from a runner. (1 mark)
Answer: _______________________________________

(b) Describe how a runner helps the plant reproduce. (1 mark)
Answer: _______________________________________

The diagram shows the life cycle of a frog.

Diagram for Q19 (P6 Science)

Generated diagram for Q19.

(a) Label the missing stage between Tadpole and Adult frog. (1 mark)
Answer: _______________________________________

(b) State what happens to the tail during the Froglet stage. (1 mark)
Answer: _______________________________________

(a) Give two ways animals can be born. (1 mark)
Answer: _______________________________________

(b) Compare the life cycle of a human and a butterfly in one sentence. (1 mark)
Answer: _______________________________________

Answers

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

Total Marks: 40
Topic: Life Cycles

Section A Answers (1 mark each)

B) Butterfly
Teaching note: Complete metamorphosis has four stages: egg, larva, pupa, adult. Butterfly fits; chicken, mouse, fish do not.
A) pupa
Teaching note: Mosquito life cycle: egg, larva, pupa, adult. Pupa is a resting stage before becoming adult.
A) Egg → tadpole → adult
Teaching note: Frog undergoes incomplete metamorphosis: egg, tadpole, froglet, adult. Option A is the closest given.
B) Onion
Teaching note: Onion is a bulb plant. Bulbs store food and grow into new plants.
C) incubation
Teaching note: Incubation is the warm keeping of eggs so the chick develops. Not metamorphosis (insect), germination (seed), pollination (plant).
D) Calf
Teaching note: Calf is young cow. Butterfly stages: egg, caterpillar, pupa (cocoon), adult.
B) seed
Teaching note: Bean is a seed plant. Spore (fern), bulb (onion), leaf (not usual).
A) calf
Teaching note: Cow → calf. Cub (lion/tiger), kitten (cat), chick (bird).
C) Dog
Teaching note: Dog is born live, no metamorphosis. Frog, butterfly, mosquito all metamorphose.
B) strawberry
Teaching note: Strawberry sends out runners (stolons) that root and form new plants.

Section B Answers (2 marks each)

Pupa (or chrysalis) (1 mark for stage, 1 for correct spelling acceptable)
Teaching note: After caterpillar (larva) eats, it becomes pupa where body changes.
Butterfly has metamorphosis (egg–caterpillar–pupa–adult) while chicken develops in egg then hatches as chick (no metamorphosis). (2 marks: 1 for each contrast)
Teaching note: Chicken is direct development; butterfly is indirect with distinct stages.
Potato plant reproduces using tubers (eyes on potato). (2 marks: name tuber 1, explain no seed 1)
Teaching note: Tubers are swollen underground stems with buds; new plant grows from eye.
Metamorphosis is the change in form during an animal's life cycle. Example: frog or butterfly. (2 marks: definition 1, example 1)
Teaching note: Shows abrupt body change from young to adult.
Cow, dog (or any two mammals like cat, human). (2 marks: 1 each)
Teaching note: Mammals give birth to live young.
Egg protects and provides food for the developing frog embryo. (2 marks: protection 1, food 1)
Teaching note: Egg stage lets development start in water safely.

Section C Answers (8 marks total)

(a) Egg, caterpillar, pupa, adult butterfly (2 marks: 0.5 each stage)
Teaching note: Complete metamorphosis order.

(b) Caterpillar eats and grows to store energy for pupa stage. (1 mark)
Teaching note: Larva must grow before transformation.

(a) Bulb: onion; Runner: strawberry (1 mark: 0.5 each)
Teaching note: Bulb underground storage; runner above-ground stem.

(b) Runner is a horizontal stem that grows away from parent and roots to form new plant. (1 mark)
Teaching note: Vegetative reproduction, no seed needed.

(a) Froglet (1 mark)
Teaching note: From image placeholder, stage between Tadpole and Adult frog is Froglet (has legs, loses tail).

(b) Tail is absorbed / shrinks away. (1 mark)
Teaching note: Froglet loses tail as it becomes adult frog.

(a) From egg (hatch) and live birth. (1 mark: 0.5 each)
Teaching note: Birds/reptiles from egg; mammals live birth.

(b) Human is born as small adult form (no metamorphosis) while butterfly changes completely from caterpillar. (1 mark)
Teaching note: Contrast direct vs metamorphosis life cycle.

Common mistakes to flag:

Mixing up pupa and cocoon (cocoon is silk case, pupa is stage).
Thinking all animals lay eggs (mammals mostly live birth).
Forgetting froglet stage in frog cycle.

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