October 28, 2026
Class 4 Science Questions with Answers: Free Practice Set
10 Class 4 science questions with answers: plants, animal classification, the human body, states of matter, and light, sound and heat.
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Class 4 science covers how plants are built, how animals are grouped, the digestive and other body systems in more detail, solids, liquids and gases, and how light, sound and heat behave.
These 10 Class 4 science questions come with answers and explanations.
What Class 4 Science covers
Brain & Bounce Kids splits Class 4 Science into these 10 topics. Linked topics have their own practice set.
- Living & Non-Living (Characteristics & Processes)
- Plants (Structure & Functions)
- Animals (Classification & Adaptations)
- Human Body Systems (Detailed)
- Food, Digestion & Health
- Matter (States & Properties)
- Force, Work & Energy
- Light, Sound & Heat
- Earth & Environment
- Machines & Everyday Technology
10 Class 4 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 (Structure & Functions)
Q1. Which of these is NOT a part of a plant?
A) Root
B) Stem
C) Branch
D) Wheel
Show answer
Answer: D) Wheel
A wheel is not a part of any plant.
Q2. Why are roots important for plants?
A) They produce flowers.
B) They make seeds.
C) They absorb water and hold the plant firmly in the soil.
D) They prepare food.
Show answer
Answer: C) They absorb water and hold the plant firmly in the soil.
Roots absorb water and minerals and keep the plant firmly fixed in the ground.
Animals (Classification & Adaptations)
Q3. Which animal is specially adapted to live in the desert?
A) Camel
B) Penguin
C) Polar bear
D) Seal
Show answer
Answer: A) Camel
A camel has adaptations like a hump and long eyelashes to survive in the desert.
Q4. Which animal breathes through gills throughout its life?
A) Fish
B) Dog
C) Eagle
D) Lizard
Show answer
Answer: A) Fish
Fish use gills to breathe underwater.
Human Body Systems (Detailed)
Q5. Which body system helps us breathe?
A) Digestive system
B) Respiratory system
C) Skeletal system
D) Circulatory system
Show answer
Answer: B) Respiratory system
The respiratory system helps us take in oxygen and remove carbon dioxide.
Q6. Which organ is mainly responsible for exchanging oxygen and carbon dioxide?
A) Heart
B) Lungs
C) Kidneys
D) Stomach
Show answer
Answer: B) Lungs
The lungs exchange oxygen and carbon dioxide during breathing.
More practice: Class 4 Human Body Questions with Answers
Matter (States & Properties)
Q7. Which state of matter has a fixed shape and a fixed volume?
A) Solid
B) Liquid
C) Gas
D) Water vapour
Show answer
Answer: A) Solid
Solids have both a fixed shape and a fixed volume.
Q8. Which property is common to all matter?
A) It gives light.
B) It occupies space and has mass.
C) It is always visible.
D) It is always hard.
Show answer
Answer: B) It occupies space and has mass.
All matter has mass and occupies space.
Light, Sound & Heat
Q9. Which of these is a source of heat?
A) Ice cube
B) Sun
C) Mirror
D) Book
Show answer
Answer: B) Sun
The Sun provides both heat and light to the Earth.
Q10. Which of the following produces sound?
A) A vibrating guitar string
B) A still book
C) A closed notebook
D) A sleeping cat
Show answer
Answer: A) A vibrating guitar string
Sound is produced when an object vibrates.
How to help your child with Class 4 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 4 Maths · Class 4 English · Class 4 Computer · Class 4 GK · Class 4 Reasoning · Class 3 Science · Class 5 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 4, an explanation after every answer, and a Parent Zone that shows which topics need work.
Frequently asked questions
- What topics are covered in Class 4 Science?
- Brain & Bounce Kids covers 10 topics in Class 4 Science: Living & Non-Living (Characteristics & Processes), Plants (Structure & Functions), Animals (Classification & Adaptations), Human Body Systems (Detailed), Food, Digestion & Health, Matter (States & Properties), Force, Work & Energy, Light, Sound & Heat, Earth & Environment, Machines & Everyday Technology.
- Are these Class 4 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 4 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.