October 28, 2026
Class 3 Science Questions with Answers: Free Practice Set
10 Class 3 science questions with answers: plants, animal adaptations, the human body, food and nutrition, and materials.
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- class-3
- science
Class 3 science asks "how" and "why": how plants make food, why animals have the bodies they do, how our body systems work together, what a balanced diet is, and what different materials are made of. It's also the first year many children sit the NSO.
These 10 Class 3 science questions come with answers and explanations from our practice bank.
What Class 3 Science covers
Brain & Bounce Kids splits Class 3 Science into these 10 topics. Linked topics have their own practice set.
- Living & Non-Living Things (Advanced)
- Plants & Their Functions
- Animals & Their Adaptations
- Human Body Systems
- Food & Nutrition
- Air, Water & Environment
- Matter & Materials
- Force, Work & Energy (Basic)
- Light, Sound & Heat
- Earth & Space
10 Class 3 Science questions with answers
Ask your child to answer each question out loud first, then tap Show answer to check. The questions get a little harder as you go down each topic.
Plants & Their Functions
Q1. What is the main function of the stem?
A) To make seeds
B) To absorb water
C) To support the plant and carry water
D) To attract insects
Show answer
Answer: C) To support the plant and carry water
The stem supports the plant and transports water and food.
Q2. Why are leaves usually green?
A) They contain chlorophyll
B) They absorb soil
C) They store seeds
D) They produce roots
Show answer
Answer: A) They contain chlorophyll
Chlorophyll gives leaves their green color.
Animals & Their Adaptations
Q3. Which animal has webbed feet to help it swim?
A) Duck
B) Horse
C) Lion
D) Rabbit
Show answer
Answer: A) Duck
Webbed feet help ducks swim easily.
Q4. Which animal uses a long neck to reach leaves high in trees?
A) Elephant
B) Giraffe
C) Tiger
D) Kangaroo
Show answer
Answer: B) Giraffe
A giraffe's long neck helps it eat leaves from tall trees.
More practice: Class 3 Animal Adaptations Questions with Answers
Human Body Systems
Q5. Which body system carries oxygen and nutrients to all parts of the body?
A) Circulatory system
B) Nervous system
C) Respiratory system
D) Skeletal system
Show answer
Answer: A) Circulatory system
The circulatory system carries blood, oxygen, and nutrients throughout the body.
Q6. What is the main job of the digestive system?
A) To pump blood
B) To help us breathe
C) To break down food
D) To help us move
Show answer
Answer: C) To break down food
The digestive system breaks down food into nutrients.
Food & Nutrition
Q7. Which of these foods is rich in calcium?
A) Milk
B) Rice
C) Orange
D) Tomato
Show answer
Answer: A) Milk
Milk is rich in calcium, which helps build strong bones and teeth.
Q8. Which nutrient helps protect the body from diseases and keeps us healthy?
A) Vitamins
B) Fats
C) Sugar
D) Starch
Show answer
Answer: A) Vitamins
Vitamins help keep the body healthy and support the immune system.
More practice: Class 3 Food and Nutrition Questions with Answers
Matter & Materials
Q9. Which material is soft and commonly used to make clothes?
A) Steel
B) Cotton
C) Stone
D) Glass
Show answer
Answer: B) Cotton
Cotton is soft and comfortable for clothing.
Q10. Which material is most suitable for making window panes?
A) Cloth
B) Glass
C) Cardboard
D) Rubber
Show answer
Answer: B) Glass
Glass is transparent and strong enough for windows.
How to help your child with Class 3 Science
- Connect it to what they see. Plants on the balcony, ice melting in a glass and shadows at different times of day are all science lessons.
- Ask "why?" after every answer. Science questions in Olympiads often test the reason, not the fact.
- Draw it. Labelling a plant, the parts of the body or the water cycle helps children remember structure.
- Keep it short and regular. A few questions a day keeps facts fresh far better than cramming before a test.
Olympiad connection
Science practice supports the NSO (National Science Olympiad). Its Level 1 paper tests the school science and EVS syllabus plus logical reasoning. Our NSO 2026-27 guide covers the pattern and a study plan. See our guides: Olympiad exams for Classes 1–5 · logical reasoning practice.
More practice sets
Class 3 Maths · Class 3 English · Class 3 Computer · Class 3 GK · Class 3 Reasoning · Class 2 Science · Class 4 Science · All practice questions
Practise more with Brain & Bounce Kids
These questions come from the Brain & Bounce Kids question bank. In the app, your child gets five minutes of Science practice a day at the right level for Class 3, an explanation after every answer, and a Parent Zone that shows which topics need work.
Frequently asked questions
- What topics are covered in Class 3 Science?
- Brain & Bounce Kids covers 10 topics in Class 3 Science: Living & Non-Living Things (Advanced), Plants & Their Functions, Animals & Their Adaptations, Human Body Systems, Food & Nutrition, Air, Water & Environment, Matter & Materials, Force, Work & Energy (Basic), Light, Sound & Heat, Earth & Space.
- Are these Class 3 Science questions useful for Olympiads?
- Yes. NSO (National Science Olympiad) Level 1 is built on the same school science and EVS topics. Olympiad questions add more "why" and application questions, so ask your child to explain each answer, not just pick it.
- How much Science practice does a Class 3 child need each day?
- Five to ten minutes a day is enough for most children in Classes 1–5. Short, regular practice with an explanation after each mistake works better than a long session once a week.