Common Science Questions and Answers for Kids

Common Science Questions for Kids

Common science questions with answers are insightful resources for kids by making them informed and updated about fascinating science facts. Children are naturally curious, and these common science questions covering topics from Physics, Chemistry, and Biology keep them more engaged in learning. We will provide here some common science questions with answers that will allow the kids to experience the joy of learning and satisfy their curious minds.

Read more: Solar system

100 Science Quiz Questions with Answers

Students must strengthen their knowledge base on science topics and remain informed about facts and figures related to biology, physics, and chemistry. The following science quiz questions and answers can be an important part of their learning journey.

Biology Questions and Answers

Biology helps students understand how living things grow, move, and survive. Here are some common biology questions and answers that help kids expand their knowledge and build awareness about the life process.

• Why do plants need sunlight?

Answer: Plants need sunlight to make food through photosynthesis.

• Why do we blink our eyes?

Answer: We blink to keep our eyes moist and clean.

• What is the largest sensory organ in the human body?

Answer: The skin is the largest sensory organ in our body.

• How do fish breathe underwater?

Answer: Fish breathe through gills.

• Why do we yawn?

Answer: We yawn to take in more oxygen required by our brain when we feel tired.

• Which is the smallest bone in the human body, and where is it found?

Answer: The stapes in the ear is the smallest bone in the human body.

• What is the scientific study of insects known as?

Answer: Entomology

• What grows quicker, hair or toenails?

Answer: Hair

• What organ of the human body consists of a crown and a root?

Answer: Tooth

• How many bones does the adult human skeleton consist of?

Answer: 206 bones.

• Which substance gives plants their green colour?

Answer: Chlorophyll.

• Which part of the plant makes food?

Answer: Leaves.

• How do we get Vitamin D?

Answer: From sunlight.

• What causes the red colour of blood?

Answer. Haemoglobin

• What is the scientific name of the Mango?

Answer: Mangifera Indica.

• Which pigment is responsible for the colour of our skin?

Answer: Melanin.

• Which bird cannot fly?

Answer: Ostrich

• What do we call animals that eat both plants and meat?

Answer: Omnivores.

• What disease is caused by Vitamin B deficiency?

Answer: Beriberi

• What are Leguminous Plants?

Answer: The leguminous plants are defined as the plants that produce seeds in pods. 

• What is special about amphibians?

Answer: Amphibians’ habitat consists of both aquatic and terrestrial environments.

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Physics Questions and Answers

Physics concepts help your child understand how things move, how forces work, and why different phenomena occur. The physics questions and answers given below can make science learning more interesting for kids.

• Why do objects fall to the ground from a height?

Answer: Objects fall on the ground due to the gravitational force that pulls objects toward the center of the Earth.

• Why do we see lightning first but hear the thunder later?

Answer: We see the lightning first and then hear the thunder because light travels faster than sound.

• What natural phenomenon occurs when the Moon fully covers the sun?

Ans: The Solar Eclipse.

• Which instrument is used to measure the magnitude of earthquakes?

Ans: The magnitude of the earthquake is measured by the instrument called seismograph.

• Why do ice cubes float in water?

Answer: When water freezes, it expands and becomes less dense than the same amount of liquid water.

• What kind of energy is provided by the sun?

Answer: Solar energy

• What do we call the molten rock that erupts from the interior of the Earth?

Answer: Magma.

• What would happen to your weight if you went to the moon?

Answer: The weight decreases by 1/6th on the moon as compared to our weight on the Earth.

• How does a rainbow form?

Answer: A rainbow forms when sunlight passes through raindrops in the air and splits into seven colours: violet, indigo, blue, green, yellow, orange, and red.

• What causes day and night?

Answer: The rotation of the earth around its axis causes day and night.

• What kind of mirror is used in cars as a rear-view mirror?

Answer: Convex mirror.

• Which force resists motion between two surfaces?

Answer: Friction force.

• Which energy moves through vibrations?

Answer: Sound energy

• Which simple machine helps lift heavy objects easily?

Answer: Pulley.

• How does a compass work?

Answer: The north pole of the magnetic needle of the compass aligns with the earth’s magnetic field and always points toward geographic north.

• How is dew formed?

Answer: Dew is formed by the condensation of water vapour when the air comes in contact with a colder ground surface at night.

Read more: Changes Around Us Class 6 Science

Chemistry Questions and Answers

Chemistry is about matters, their behaviours, and how they interact with each other. Here are some chemistry questions and answers for your child to explore.

• Why does iron rust?

Answer: Iron rusts when it reacts with air and moisture to form a reddish-brown substance known as iron oxide.

• What are the three states of matter?

Answer: The three states of matter are solid, liquid, and gas.

• Is boiling an egg a physical change or chemical change?

Answer: Boiling of egg is a chemical change because it produces a new substance which can’t be brought back to its original form.

• Which gas is filled in balloons?

Answer: Helium

• What is the hardest natural substance on Earth?

Answer: Diamond.

• Which metal remains in liquid form at room temperature?

Answer: Mercury.

• What elements are water made of?

Answer: Hydrogen and oxygen.

• Which acid is found in lemon?

Answer: Citric acid.

• What’s the boiling point of water in Celsius?

Answer: 100°C

• Which gas is most abundant in the air around us?

Answer: Nitrogen gas is the most abundant gas present in the air.

• Which solid substance directly converts to vapour without going through the liquid stage?

Answer: Camphor and naphthalene change their state from directly from solid to vapor.

• What gas do animals exhale when they breathe out?

Answer: Carbon dioxide (CO₂).

• Which gas is essential for fire to burn?

Answer: Oxygen.

• What is the pH of pure water?

Answer: 7 (neutral)

• What is the chemical name of common salt?

Answer: Sodium Chloride.

• Which non-metal substance is a good conductor of electricity?

Answer: Graphite.

• What is Brass made of?

Answer: Brass is made of two different metals: copper and zinc.

• What is the freezing point of water in Fahrenheit?

Answer: 32°F.

Also read: Motion and Measurement of Distance

Science is not just a subject to be studied in schools; it opens doors to gather more knowledge and explore many interesting facts about the world. Common science questions with answers can help develop knowledge, critical thinking, and curiosity in kids that guide them in the learning journey ahead.  

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