100 Science Quiz Questions with Answers for Kids – Spark Curiosity and Fun Learning!

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)

  1. What planet do we live on? Earth
  2. What do bees collect from flowers? Nectar
  3. Which gas do we need to breathe? Oxygen
  4. What is H2O commonly called? Water
  5. How many legs does a spider have? Eight
  6. What do we call animals that eat only plants? Herbivores
  7. What is the center of our solar system? The Sun
  8. Which organ pumps blood in our body? The Heart
  9. What do plants need from sunlight to make food? Energy
  10. Which part of the plant grows underground? Roots
  11. What do we use to see things far away? Telescope
  12. What state of matter is air? Gas
  13. Which tool is used to measure time? Clock
  14. What causes day and night? Earth’s rotation
  15. What do you call water when it turns into gas? Steam
  16. How many planets are in the solar system? Eight
  17. Which planet is closest to the Sun? Mercury
  18. What helps us float in water? Buoyancy
  19. Which natural satellite orbits the Earth? The Moon
  20. Which gas do plants breathe in? Carbon dioxide

The Human Body (21–40)

  1. How many bones are in the human body? 206
  2. Which organ helps us breathe? Lungs
  3. What covers and protects our body? Skin
  4. Which sense organ helps us see? Eyes
  5. Which part of the body helps us think? Brain
  6. What liquid flows in our veins? Blood
  7. How many fingers do we have in total? Ten
  8. What helps us chew food? Teeth
  9. What connects our bones together? Joints
  10. What is the colored part of the eye called? Iris
  11. Which organ removes waste from our body? Kidneys
  12. What helps our body move? Muscles
  13. Where is food digested? Stomach
  14. What do we hear with? Ears
  15. Which sense detects smell? Nose
  16. Which organ pumps blood? Heart
  17. What is the largest organ of the human body? Skin
  18. What helps us breathe and talk? Voice box (larynx)
  19. How many teeth does an adult human usually have? 32
  20. What carries messages to and from the brain? Nerves

Earth and Space (41–60)

  1. Which planet is known as the Red Planet? Mars
  2. What keeps us on the ground? Gravity
  3. What is the largest planet? Jupiter
  4. What is Earth’s only natural satellite? The Moon
  5. What do we call a scientist who studies space? Astronomer
  6. What do stars make? Light
  7. Which planet has rings around it? Saturn
  8. What is a group of stars called? Constellation
  9. What do we use to observe distant stars? Telescope
  10. Which planet is known for its blue color? Neptune
  11. How long does Earth take to rotate once? 24 hours
  12. What do we call frozen water that falls from the sky? Snow
  13. What causes tides in the oceans? Moon’s gravity
  14. What is the hottest planet? Venus
  15. What do we call Earth’s movement around the Sun? Revolution
  16. What protects the Earth from harmful sun rays? Ozone layer
  17. How many continents are there? Seven
  18. What layer of the Earth do we live on? Crust
  19. Which is the smallest planet? Mercury
  20. What is a meteor that reaches Earth’s surface called? Meteorite

Animals and Nature (61–80)

  1. Which animal is the largest mammal? Blue Whale
  2. Which bird can talk? Parrot
  3. What is the fastest land animal? Cheetah
  4. Which animal has a trunk? Elephant
  5. Which animal lays eggs? Birds
  6. What do caterpillars turn into? Butterflies
  7. Which animal is known as man’s best friend? Dog
  8. Which animal purrs and meows? Cat
  9. Which bird is a national symbol of the USA? Bald Eagle
  10. What do you call a baby frog? Tadpole
  11. Which insect makes honey? Bee
  12. What do we call animals that live in water? Aquatic animals
  13. Which animal is known for its black and white stripes? Zebra
  14. What do pandas eat? Bamboo
  15. Which reptile changes its skin color? Chameleon
  16. Which animal is known as the king of the jungle? Lion
  17. Which bird cannot fly? Ostrich
  18. Which mammal lays eggs? Platypus
  19. Which sea animal has eight arms? Octopus
  20. What do we call a group of lions? Pride

Science in Everyday Life (81–100)

  1. What tool tells the temperature? Thermometer
  2. What helps us see tiny things? Microscope
  3. Which invention lets us talk from far away? Telephone
  4. What do we use to clean hands? Soap
  5. What machine keeps food cold? Refrigerator
  6. Which appliance helps us cook food fast? Microwave
  7. What do we use to write on paper? Pen
  8. What makes cars move? Engine
  9. Which device shows directions? Compass
  10. What is used to clean the floor? Vacuum cleaner
  11. Which source of energy comes from the Sun? Solar energy
  12. What do we call power from moving water? Hydropower
  13. Which gas is used in balloons to make them float? Helium
  14. What is used to save computer files? USB drive
  15. What helps plants grow? Sunlight and water
  16. What do plants give us to breathe? Oxygen
  17. Which invention lets us fly in the sky? Airplane
  18. What makes thunder and lightning? Storms
  19. What fuels most cars today? Petrol (Gasoline)
  20. 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!

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