100 Science Quiz Questions with Answers for Kids – Science is fascinating! Whether it's the stars twinkling in the night sky, the plants growing in the garden, or how our own bodies work — science is everywhere. What better way to help kids explore the world than through fun and educational quizzes?
Here are 100 science quiz questions with answers for kids that are perfect for classrooms, online learning, homeschooling, or even family quiz nights. These questions cover topics like animals, the human body, space, Earth, inventions, and more. Let the learning fun begin!
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General Science (1–20)
- What planet do we live on? Earth
- What do bees collect from flowers? Nectar
- Which gas do we need to breathe? Oxygen
- What is H2O commonly called? Water
- How many legs does a spider have? Eight
- What do we call animals that eat only plants? Herbivores
- What is the center of our solar system? The Sun
- Which organ pumps blood in our body? The Heart
- What do plants need from sunlight to make food? Energy
- Which part of the plant grows underground? Roots
- What do we use to see things far away? Telescope
- What state of matter is air? Gas
- Which tool is used to measure time? Clock
- What causes day and night? Earth’s rotation
- What do you call water when it turns into gas? Steam
- How many planets are in the solar system? Eight
- Which planet is closest to the Sun? Mercury
- What helps us float in water? Buoyancy
- Which natural satellite orbits the Earth? The Moon
- Which gas do plants breathe in? Carbon dioxide
The Human Body (21–40)
- How many bones are in the human body? 206
- Which organ helps us breathe? Lungs
- What covers and protects our body? Skin
- Which sense organ helps us see? Eyes
- Which part of the body helps us think? Brain
- What liquid flows in our veins? Blood
- How many fingers do we have in total? Ten
- What helps us chew food? Teeth
- What connects our bones together? Joints
- What is the colored part of the eye called? Iris
- Which organ removes waste from our body? Kidneys
- What helps our body move? Muscles
- Where is food digested? Stomach
- What do we hear with? Ears
- Which sense detects smell? Nose
- Which organ pumps blood? Heart
- What is the largest organ of the human body? Skin
- What helps us breathe and talk? Voice box (larynx)
- How many teeth does an adult human usually have? 32
- What carries messages to and from the brain? Nerves
Earth and Space (41–60)
- Which planet is known as the Red Planet? Mars
- What keeps us on the ground? Gravity
- What is the largest planet? Jupiter
- What is Earth’s only natural satellite? The Moon
- What do we call a scientist who studies space? Astronomer
- What do stars make? Light
- Which planet has rings around it? Saturn
- What is a group of stars called? Constellation
- What do we use to observe distant stars? Telescope
- Which planet is known for its blue color? Neptune
- How long does Earth take to rotate once? 24 hours
- What do we call frozen water that falls from the sky? Snow
- What causes tides in the oceans? Moon’s gravity
- What is the hottest planet? Venus
- What do we call Earth’s movement around the Sun? Revolution
- What protects the Earth from harmful sun rays? Ozone layer
- How many continents are there? Seven
- What layer of the Earth do we live on? Crust
- Which is the smallest planet? Mercury
- What is a meteor that reaches Earth’s surface called? Meteorite
Animals and Nature (61–80)
- Which animal is the largest mammal? Blue Whale
- Which bird can talk? Parrot
- What is the fastest land animal? Cheetah
- Which animal has a trunk? Elephant
- Which animal lays eggs? Birds
- What do caterpillars turn into? Butterflies
- Which animal is known as man’s best friend? Dog
- Which animal purrs and meows? Cat
- Which bird is a national symbol of the USA? Bald Eagle
- What do you call a baby frog? Tadpole
- Which insect makes honey? Bee
- What do we call animals that live in water? Aquatic animals
- Which animal is known for its black and white stripes? Zebra
- What do pandas eat? Bamboo
- Which reptile changes its skin color? Chameleon
- Which animal is known as the king of the jungle? Lion
- Which bird cannot fly? Ostrich
- Which mammal lays eggs? Platypus
- Which sea animal has eight arms? Octopus
- What do we call a group of lions? Pride
Science in Everyday Life (81–100)
- What tool tells the temperature? Thermometer
- What helps us see tiny things? Microscope
- Which invention lets us talk from far away? Telephone
- What do we use to clean hands? Soap
- What machine keeps food cold? Refrigerator
- Which appliance helps us cook food fast? Microwave
- What do we use to write on paper? Pen
- What makes cars move? Engine
- Which device shows directions? Compass
- What is used to clean the floor? Vacuum cleaner
- Which source of energy comes from the Sun? Solar energy
- What do we call power from moving water? Hydropower
- Which gas is used in balloons to make them float? Helium
- What is used to save computer files? USB drive
- What helps plants grow? Sunlight and water
- What do plants give us to breathe? Oxygen
- Which invention lets us fly in the sky? Airplane
- What makes thunder and lightning? Storms
- What fuels most cars today? Petrol (Gasoline)
- What kind of energy powers a flashlight? Battery
Conclusion
We hope these 100 science quiz questions for kids help build curiosity, knowledge, and a love for learning! Whether you're a parent, teacher, or curious learner, these fun facts and questions are perfect for sparking conversations and promoting scientific thinking.
Have fun learning!
