Class 4 Science Olympiad Sample Paper PDF

Updated for 2026–27: this page provides a free SCO Class 4 Science Olympiad sample-paper PDF plus archived practice questions retained from an older School Connect paper. The existing URL is preserved for search continuity, while the visible content now follows the current SCO preparation pathway.

For Class 4, a good sample paper should test more than recall. Students should classify plants and animals, interpret diagrams, connect body systems, reason about materials and waste, and explain everyday science. Use the archived PDF below for additional practice, but use the current 2026 SCO resources for final preparation.

Class 4 Science Olympiad Sample Paper PDF — Free Practice

Class-4-ISO-2 Download

Current SCO Class 4 Science Resources for 2026

Use the live SCO resources before relying on any archived paper. The current Class 4 Science hub provides a 2026 syllabus, sample paper, answer key and previous-year paper as one connected preparation path.

Current SCO Class 4 Science Olympiad page — current subject hub and preparation resources.
Class 4 Science Olympiad Syllabus (2026) — start here.
Class 4 Science Sample Paper 1 (2026) — current timed practice.
Class 4 Science Sample Paper Answer Key (2026) — use after attempting the paper.
Class 4 Science Previous Year Paper (2026) — use after syllabus and sample-paper revision.

Recommended order: syllabus → current sample paper → answer-key review → archived paper below → 2026 previous-year paper → error analysis. Follow the live SCO exam page and admit-card instructions for exam-day rules rather than older OMR directions.

Archived Class 4 Science Practice Questions

The questions below are retained for additional practice. They are useful for plants, animal adaptation, circulation, roots, teeth, birds, housing and environmental science. Use the concept review after the key to understand the science behind each answer.

1. Which of the following is an example of a fixed aquatic plant?

Hyacinth
Hydrilla
Duckweed
Water lily

2.Fill in the flowchart and then choose the correct option.

Class 4 Science Olympiad animal habitat classification question

Animals that can live on land and water. Animals that can live on trees. Animals that live on land.

Arboreal, amphibian, terrestrial
Amphibian, arboreal, terrestrial
Terrestrial, arboreal, amphibian
Arboreal, terrestrial, Amphibian

3. Match the following and then choose the correct option.

1	Arteries	A	Pumps blood to the whole body
2	Vein	B	Takes blood back to the heart
3	Capillaries	C	Carry blood from the heart
4	Heart	D	Tiny blood vessels

B, 2- A, 3- C-, 4-D
B, 2- C, 3- D, 4-A
A, 2- C, 3- D, 4-B
C, 2- B, 3- D, 4-A

4. Which adaptation is shown by a porcupine to protect itself?

It has quills all over its body.
It has a poisonous venom to kill its body.
It camouflages.
It runs very fast to escape from its enemy.

5. Which is the fibrous root in the given diagram?

Class 4 Science Olympiad fibrous root and taproot identification question

A
B
C
None

6. Read the sentences given below carefully. Say if they are true or false. Then choose the correct option.

Grass eating animals like Cows, Buffaloes, etc have broad molars to grind their food.
Herbivorous animals have big canines.
Carnivores have sharp canines and developed molars.
Front teeth of rodents always keep growing.

TFTT
FTTF
TTTF
FTTT

7. Choose the correct option:

Beaks are used by birds for:

Pick grains and tear flesh
Fight and make their nests
Clean themselves and feed their young ones
Walking, running and swimming

1 and 2
1, 2 and 3
3 and 4
All of these

8. Choose the correct option:

Different kind of houses to live are built depending upon-

Climate
Building materials easily available
Economic conditions
Individual preferences

1 and 2
1, 2 and 3
3 and 4
All of these

9. Observe one pair and choose the correct option to complete the second pair.

Biodegradable waste: peels of fruits and vegetables:: Non biodegradable waste: _______

Plastic
Clothes
Paper
Jute

10. Choose the correct option by reading both sentence 1 and 2.

Sentence 1: The method of making natural manure is called recycling.

Sentence 2: In this process, all non-biodegradable waste is dumped into a pit.

Sentence 1 is correct but Sentence 2 is wrong.
Sentence 1 is wrong but Sentence 2 is correct.
Both Sentences 1 and 2 are correct.
Both Sentences 1 and 2 are wrong.

Answer Keys:

Ques. 1	(d)	Ques. 6	(a)
Ques. 2	(b)	Ques. 7	(b)
Ques. 3	(d)	Ques. 8	(d)
Ques. 4	(a)	Ques. 9	(a)
Ques. 5	(c)	Ques. 10	(d)

Original answer key retained from the archived SCO Class 4 practice content

Answer Explanations and Concept Review

Fixed aquatic plant — (d): water lily is rooted in the soil below water while its leaves float on the surface. Water hyacinth and duckweed are free-floating plants.
Animal habitats — (b): amphibians can live on land and in water, arboreal animals live mainly in trees, and terrestrial animals live on land.
Circulation — (d): arteries carry blood away from the heart, veins return blood to the heart, capillaries are tiny blood vessels, and the heart pumps blood around the body.
Porcupine defence — (a): porcupines protect themselves with sharp quills.
Root identification — archived key (c): use the diagram to compare a fibrous root system with a single main taproot. The correct option depends on the labelled image, so students should learn the visual difference rather than memorize the letter.
Animal teeth — (a): herbivores have broad grinding molars, usually lack large flesh-tearing canines, carnivores have sharp canines, and rodent incisors keep growing.
Bird beaks — (b): beaks are used for feeding, fighting, nest building, preening and feeding young; birds use legs/feet rather than beaks for walking or swimming.
Housing — (d): climate, locally available materials, economic conditions and personal needs can all influence the kind of house people build.
Waste — (a): plastic is generally non-biodegradable, unlike materials such as paper and jute that can decompose under suitable conditions.
Composting — (d): making natural manure from biodegradable waste is called composting, not simply recycling, and non-biodegradable waste should not be put into a compost pit.

Fresh Class 4 Science Mini Challenge

Which part of a plant mainly absorbs water from the soil?
A. Flower B. Root C. Fruit D. Seed
Which change is irreversible?
A. Melting ice B. Freezing water C. Burning paper D. Melting chocolate
Why do we see lightning before we hear thunder?
A. Sound travels faster B. Light travels much faster than sound C. Thunder happens later every time D. Lightning makes no sound
Which material is best described as biodegradable?
A. Plastic bottle B. Vegetable peel C. Glass jar D. Aluminium can
Which organ pumps blood around the body?
A. Lungs B. Brain C. Heart D. Stomach

Answers: 1-B, 2-C, 3-B, 4-B, 5-C. Ask the student to explain each answer in one or two sentences rather than only checking the option letter.

4-Week Class 4 Science Olympiad Practice Plan

Week	Focus	What to measure
1	Read the 2026 syllabus and revise plants, animals, food/digestion and the human body.	Can the student explain concepts without memorised definitions?
2	Revise matter/materials, force/energy, environment, Earth/space and everyday applications.	Can the student apply concepts to new examples?
3	Attempt the current 2026 sample paper with a timer and review the answer key afterwards.	Accuracy, diagram reading and careless mistakes.
4	Attempt this archived paper and then the 2026 previous-year paper.	Repeated weak topics, speed and improvement.

Parent and Teacher Checklist

Ask the student to explain why the other options are wrong.
Use simple home or classroom experiments for force, materials, water and light where safe.
Separate concept mistakes from reading, diagram and time-pressure mistakes.
Do not use the archived paper as the only syllabus reference.
Revise two weak topics before giving another timed paper.
Use the current SCO answer key only after an honest attempt.

Current SCO Science Olympiad Opportunity

As of October 8, 2026, the SCO International Science Olympiad page lists the next Winter 2027 exam slot on October 10, 2026. Students should always confirm the subject and available slot on the live calendar before registering.

View current SCO exam dates | Register for SCO Olympiad

Class 4 Science Olympiad FAQs

Is the embedded PDF the latest 2026 SCO paper?

No. It is an archived School Connect practice resource. Use the current 2026 sample paper and syllabus linked above for the active preparation cycle.

What topics should a Class 4 student revise?

The current SCO Class 4 Science pathway includes plants, animals, food and digestion, human needs, matter and materials, force/work/energy, environment, Earth and the universe, along with related application and reasoning questions.

How should students use the answer key?

Attempt the full paper first. Then classify mistakes into concept, reading, diagram or time-pressure errors and revise the related topic before attempting another paper.