# 30 Science Olympiad Questions for Class 5 with Answers
Are you looking for Science Olympiad questions for Class 5 with answers?
Class 5 Science Olympiad preparation should go beyond memorising facts. Students should understand scientific concepts and learn how to apply them to everyday situations.
This free Class 5 Science Olympiad practice test contains 30 questions covering:
- Plants
- Animals
- Human body
- Food and digestion
- Health and hygiene
- Matter and materials
- Force and energy
- Air and water
- Environment
- Earth and space
- Everyday science
- Higher-order thinking
Try to solve each question before checking the answer.
Let's begin!
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# 🔬 CLASS 5 SCIENCE OLYMPIAD PRACTICE QUESTIONS
## Question 1 – Photosynthesis
Which gas do green plants take in from the air during photosynthesis?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Answer: C. Carbon dioxide
Explanation:
Green plants use carbon dioxide, water and light energy to make food during photosynthesis.
---
## Question 2 – Plants
Which part of a flower develops into a fruit after fertilisation?
A. Root
B. Ovary
C. Leaf
D. Stem
Answer: B. Ovary
---
## Question 3 – Seed Germination
Which of the following is generally necessary for a seed to germinate?
A. Water, suitable temperature and air
B. Only sunlight
C. Only soil
D. Only darkness
Answer: A. Water, suitable temperature and air
Explanation:
Seeds generally need moisture, oxygen and a suitable temperature to germinate.
---
## Question 4 – Plant Transport
Which tissue carries water and minerals from the roots towards the other parts of a plant?
A. Xylem
B. Phloem
C. Flower
D. Fruit
Answer: A. Xylem
---
## Question 5 – Plant Reproduction
Which part of a plant produces pollen?
A. Root
B. Anther
C. Ovary
D. Sepal
Answer: B. Anther
---
# 🐘 ANIMALS
## Question 6 – Herbivores
Which animal is mainly a herbivore?
A. Lion
B. Cow
C. Tiger
D. Eagle
Answer: B. Cow
---
## Question 7 – Adaptation
Why does a camel have broad, padded feet?
A. To swim faster
B. To walk more easily on sandy ground
C. To climb trees
D. To catch fish
Answer: B. To walk more easily on sandy ground
Explanation:
Broad feet help distribute the camel's weight over a larger area and make walking on sand easier.
---
## Question 8 – Animal Habitats
Which animal is best adapted to living in very cold regions?
A. Polar bear
B. Camel
C. Lizard
D. Elephant
Answer: A. Polar bear
---
## Question 9 – Food Chain
Which of the following is a correct food chain?
A. Grass → Grasshopper → Frog → Snake
B. Snake → Frog → Grasshopper → Grass
C. Frog → Grass → Snake → Grasshopper
D. Grasshopper → Grass → Frog → Snake
Answer: A. Grass → Grasshopper → Frog → Snake
---
## Question 10 – Food Chain
In a simple food chain, which organism usually makes its own food?
A. Producer
B. Herbivore
C. Carnivore
D. Decomposer
Answer: A. Producer
Explanation:
Green plants are producers because they make their own food.
---
# 🧍 HUMAN BODY
## Question 11 – Digestive System
Which organ stores food temporarily and helps digest it?
A. Heart
B. Stomach
C. Lungs
D. Kidney
Answer: B. Stomach
---
## Question 12 – Small Intestine
Most nutrients from digested food are absorbed into the blood through the:
A. Mouth
B. Stomach
C. Small intestine
D. Large intestine
Answer: C. Small intestine
---
## Question 13 – Circulatory System
Which organ pumps blood around the body?
A. Brain
B. Heart
C. Lungs
D. Stomach
Answer: B. Heart
---
## Question 14 – Respiratory System
Which organs are mainly responsible for taking oxygen into the body?
A. Kidneys
B. Lungs
C. Stomach
D. Liver
Answer: B. Lungs
---
## Question 15 – Skeletal System
Which system gives the body support and protects many internal organs?
A. Digestive system
B. Skeletal system
C. Respiratory system
D. Circulatory system
Answer: B. Skeletal system
---
# 🍎 FOOD AND HEALTH
## Question 16 – Balanced Diet
Which is the best example of a balanced diet?
A. Only sweets
B. Only rice
C. A variety of foods providing different nutrients
D. Only fried food
Answer: C. A variety of foods providing different nutrients
---
## Question 17 – Nutrients
Which nutrient is especially important for growth and repair of body tissues?
A. Protein
B. Water
C. Fibre
D. Salt
Answer: A. Protein
---
## Question 18 – Vitamin C
Which food is a good source of vitamin C?
A. Orange
B. Sugar
C. Butter
D. Salt
Answer: A. Orange
---
## Question 19 – Healthy Habits
Which habit helps prevent the spread of many infections?
A. Washing hands regularly
B. Sharing used tissues
C. Drinking unsafe water
D. Avoiding all exercise
Answer: A. Washing hands regularly
---
# ⚙️ MATTER AND MATERIALS
## Question 20 – States of Matter
Which state of matter has a definite volume but takes the shape of its container?
A. Solid
B. Liquid
C. Gas
D. Vacuum
Answer: B. Liquid
---
## Question 21 – Solubility
Which substance dissolves readily in water?
A. Sand
B. Sugar
C. Stone
D. Plastic
Answer: B. Sugar
---
## Question 22 – Reversible Change
Which is an example of a reversible change?
A. Burning paper
B. Melting ice
C. Cooking rice
D. Burning wood
Answer: B. Melting ice
Explanation:
Ice can melt into water and water can freeze back into ice.
---
# ⚡ FORCE AND ENERGY
## Question 23 – Force
A force can:
A. Change the motion of an object
B. Always destroy an object
C. Change every object into liquid
D. Make objects disappear
Answer: A. Change the motion of an object
---
## Question 24 – Friction
Which force opposes the motion between surfaces that are touching?
A. Gravity
B. Friction
C. Magnetism
D. Electricity
Answer: B. Friction
---
## Question 25 – Energy
Which is a renewable source of energy?
A. Coal
B. Petroleum
C. Sunlight
D. Natural gas
Answer: C. Sunlight
---
# 🌍 EARTH AND ENVIRONMENT
## Question 26 – Water Cycle
What is the process by which liquid water changes into water vapour?
A. Condensation
B. Evaporation
C. Freezing
D. Melting
Answer: B. Evaporation
---
## Question 27 – Water Conservation
Which action helps conserve water?
A. Leaving taps running
B. Repairing leaking taps
C. Washing vehicles with excessive water
D. Playing with running water
Answer: B. Repairing leaking taps
---
# 🧠 HOTS – THINK AND APPLY
## Question 28 – HOTS
A student keeps two identical plants.
Plant A is kept near a sunny window.
Plant B is kept in a dark cupboard.
Both receive enough water.
After several days, Plant B becomes weak.
What is the best explanation?
A. Plants need light to make food
B. Plants need darkness to grow
C. Water is not useful to plants
D. Plants cannot live near windows
Answer: A. Plants need light to make food
---
## Question 29 – HOTS
A metal spoon and a wooden spoon are left in the same room.
The metal spoon feels colder when touched.
What is the best explanation?
A. Metal is actually at a much lower temperature
B. Metal conducts heat away from your hand faster than wood
C. Wood produces heat
D. Metal contains ice
Answer: B. Metal conducts heat away from your hand faster than wood
---
## Question 30 – OLYMPIAD CHALLENGE
A student puts a small amount of water into a freezer.
After several hours, the water becomes ice.
Then the ice is taken out and left on a table.
After some time, it becomes water again.
Which statement best describes what happened?
A. Two reversible changes occurred
B. Two irreversible changes occurred
C. Only one change occurred
D. No change occurred
Answer: A. Two reversible changes occurred
Explanation:
Water changed into ice by freezing.
Ice changed back into water by melting.
Both changes can be reversed.
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# 🏆 COMPLETE ANSWER KEY
| Question | Answer |
|---|---|
| 1 | C |
| 2 | B |
| 3 | A |
| 4 | A |
| 5 | B |
| 6 | B |
| 7 | B |
| 8 | A |
| 9 | A |
| 10 | A |
| 11 | B |
| 12 | C |
| 13 | B |
| 14 | B |
| 15 | B |
| 16 | C |
| 17 | A |
| 18 | A |
| 19 | A |
| 20 | B |
| 21 | B |
| 22 | B |
| 23 | A |
| 24 | B |
| 25 | C |
| 26 | B |
| 27 | B |
| 28 | A |
| 29 | B |
| 30 | A |
---
# ⭐ CHECK YOUR SCORE
### 🏆 27–30 Correct — Outstanding!
Excellent science knowledge and reasoning!
### 🌟 23–26 Correct — Excellent!
Very strong performance.
Keep practising application-based questions.
### 👍 18–22 Correct — Good!
Your foundation is developing well.
Review the topics where you made mistakes.
### 💪 Below 18 — Keep Practising!
Don't worry.
Understand the concepts first and then try the test again.
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# 🔬 IMPORTANT CLASS 5 SCIENCE OLYMPIAD TOPICS
Depending on the Olympiad organiser, Class 5 Science preparation may include:
- Plants
- Plant reproduction
- Animals
- Animal habitats
- Adaptations
- Food chains
- Human body
- Digestive system
- Respiratory system
- Circulatory system
- Skeletal system
- Food and nutrients
- Health and hygiene
- Matter
- Materials
- Changes around us
- Force
- Friction
- Energy
- Air
- Water
- Water cycle
- Environment
- Earth and space
- Everyday science
- Higher-order thinking
Always check the official syllabus of the particular Olympiad before preparing.
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# 🧠 HOW TO PREPARE FOR CLASS 5 SCIENCE OLYMPIAD
Don't try to memorise every answer.
Use this method:
### 1. UNDERSTAND
Learn the concept.
### 2. OBSERVE
Look for examples around you.
### 3. ASK WHY
Question how and why things happen.
### 4. PRACTISE
Solve different types of questions.
### 5. APPLY
Use the concept in a new situation.
### 6. REVISE
Review mistakes regularly.
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# 🔎 SIMPLE SCIENCE ACTIVITIES AT HOME
## Activity 1 – Evaporation
Take equal amounts of water in two plates.
Keep one in a warm place and one in a cooler place.
Observe which one loses water faster.
Ask:
**Why?**
---
## Activity 2 – Floating and Sinking
Take safe household objects.
Before placing each object in water, predict:
**Will it float or sink?**
Then test your prediction.
---
## Activity 3 – Shadow
Place an object in sunlight.
Observe its shadow at different times of the day.
Ask:
**Does the shadow remain the same?**
---
## Activity 4 – Melting
Take an ice cube and observe it at room temperature.
Ask:
**What happens?**
**Is the change reversible?**
---
# ⏰ 30-MINUTE DAILY SCIENCE ROUTINE
### 10 minutes
Learn one concept.
### 10 minutes
Solve 5–10 questions.
### 5 minutes
Observe or perform a simple activity.
### 5 minutes
Review mistakes.
---
# 👨👩👧 PARENT TIP
When your child gives an answer, ask:
**"Why?"**
Then ask:
**"Can you give me an example?"**
And finally:
**"What would happen if we changed the situation?"**
These questions develop scientific reasoning rather than simple memorisation.
---
# 📈 TRACK YOUR PROGRESS
| Test | Score | Accuracy |
|---|---:|---:|
| Test 1 | 18/30 | 60% |
| Test 2 | 22/30 | 73% |
| Test 3 | 25/30 | 83% |
| Test 4 | 28/30 | 93% |
The goal is:
**Knowledge + Understanding + Application**
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# 🌟 MORE OLYMPIAD RESOURCES FROM OLYMPIAD DIGITAL
Continue your preparation with:
👉 20 Science Olympiad Questions for Class 1
👉 20 Science Olympiad Questions for Class 2
👉 20 Science Olympiad Questions for Class 3
👉 20 Science Olympiad Questions for Class 4
👉 30 Maths Olympiad Questions for Class 5
👉 30 Maths Olympiad Questions for Class 4
👉 30 Olympiad Reasoning Questions for Class 4
👉 50 Olympiad Reasoning Questions for Class 1–3
👉 How to Start Olympiad Preparation from Class 1
👉 How to Prepare for Olympiad Exams at Home
👉 Olympiad Exam Syllabus for Classes 1–12
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# Final Thoughts
Science is not only found in textbooks.
It is present in:
Plants growing.
Food being digested.
Ice melting.
Water evaporating.
Objects moving.
Magnets attracting objects.
Rain falling.
The Earth moving through space.
Encourage children to observe the world around them.
Teach them to ask:
**What?**
**How?**
**Why?**
**What if?**
That is the beginning of scientific thinking.
### 🔬 Observe.
### 🧠 Question.
### 💡 Understand.
### 📚 Practise.
### 🏆 Improve.
**Olympiad Digital**
**Learn. Practise. Think. Improve.**