100 best science trivia questions for kids plus answers

Are you looking for a fun way to spark curiosity in young minds? You’ve come to the right place! I have 100 science trivia questions for kids (plus the answers!) Whether you are planning a family trivia night, looking for an engaging classroom activity, or just want to test your child’s knowledge on educational STEM topics, this ultimate list of science trivia questions for kids is the perfect solution.

We have packed this ultimate general science quiz with interesting facts, covering a variety of topics from earth science to the solar system. It’s a great way to encourage critical thinking while fostering some friendly competition.

Below, you’ll find kid-friendly questions broken down by category, featuring a mix of easy science trivia questions and trickier ones for older students. Let’s dive in!

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Space & The Solar System Science Trivia Questions for Kids

Looking to explore the milky way galaxy? These science science trivia questions for kids will test their knowledge of the cosmos.

1. Question: What is the largest planet in our solar system?
   • Answer: Jupiter
2. Question: Which planet is known as the red planet?
   • Answer: Mars
3. Question: What is the hottest planet in our solar system?
   • Answer: Venus
4. Question: What is the name of the galaxy that Earth resides in?
   • Answer: The Milky Way Galaxy
5. Question: The Moon is Earth’s only what?
   • Answer: Natural satellite
6. Question: What is the speed of light?
   • Answer: Approximately 186,282 miles per second (or 299,792 kilometers per second).
7. Question: Which planet is closest to the Sun?
   • Answer: Mercury
8. Question: What giant ball of burning gas is at the center of our solar system?
   • Answer: The Sun
9. Question: True or False: Saturn is the only planet with rings.
   • Answer: False (Jupiter, Uranus, and Neptune also have rings, though they are fainter).
10. Question: How many planets are in our solar system?
    • Answer: 8

Chemistry & The Periodic Table Science Trivia Questions for Kids

From the smallest unit of matter to a chemical reaction, let’s see how much they know about the periodic table.

11. Question: What is the smallest unit of matter?
    • Answer: An atom
12. Question: What is located at the center of an atom?
    • Answer: The nucleus
13. Question: Protons, neutrons, and electrons are examples of what?
    • Answer: Subatomic particles
14. Question: What is the chemical formula for water?
    • Answer: H2O
15. Question: What gas do humans breathe out that plants need to survive?
    • Answer: Carbon dioxide
16. Question: What is the chemical symbol for Gold?
    • Answer: Au
17. Question: What determines an element’s atomic number?
    • Answer: The number of protons in its nucleus.
18. Question: What is the common name for sodium chloride?
    • Answer: Table salt
19. Question: What is the most common element (and most abundant gas) in the entire universe?
    • Answer: Hydrogen
20. Question: What branch of science specifically studies carbon-based compounds?
    • Answer: Organic chemistry

Human Body & Biology Science Trivia Questions for Kids

Discover the wonders of the adult human body, nerve cells, and how our organs filter waste with these biology science trivia questions for kids.

21. Question: What is the largest organ in the human body?
    • Answer: The skin
22. Question: What is often called the “powerhouse of the cell”?
    • Answer: Mitochondria
23. Question: Which cells in our immune system fight off infections?
    • Answer: White blood cells
24. Question: What molecule carries our genetic information (or hereditary information)?
    • Answer: DNA
25. Question: What is the name of the red pigment that carries oxygen in our blood?
    • Answer: Hemoglobin
26. Question: Which part of the body is responsible for pumping blood?
    • Answer: The heart
27. Question: What is the rarest blood type in humans?
    • Answer: AB-negative
28. Question: What do we call the cells that make up our nervous system?
    • Answer: Nerve cells (or neurons)
29. Question: Which organs filter waste from our blood?
    • Answer: The kidneys
30. Question: What part of the brain controls balance and coordination?
    • Answer: The cerebellum
31. Question: How many bones are in the adult human body?
    • Answer: 206
32. Question: Which part of your body continues to grow your entire life?
    • Answer: Your nose and ears
33. Question: True or False: Sneeze droplets can travel at speeds over 100 mph.
    • Answer: True
34. Question: What is the only human body stops mechanism that happens involuntarily when you sneeze?
    • Answer: Your eyes close.

Earth Science & Nature Science Trivia Questions for Kids

Get ready for some fantastic earth science and educational trivia about our home planet.

35. Question: What is the most abundant gas in Earth’s atmosphere?
    • Answer: Nitrogen
36. Question: What is the largest desert in the world?
    • Answer: The Antarctic Desert (followed by the Arctic Desert; the Sahara is the largest hot desert).
37. Question: What do we call a scientist who studies weather?
    • Answer: A meteorologist
38. Question: Water turning into vapor and rising into the air is the name of the process called what?
    • Answer: Evaporation
39. Question: What are the three states of matter?
    • Answer: Solid, liquid, and gas
40. Question: What instrument is used to measure earthquakes?
    • Answer: A seismograph

Animals & Wildlife Science Trivia Questions for Kids

Test your knowledge with these fun trivia questions about the animal kingdom.

41. Question: What is the only mammal capable of true, sustained flight?
    • Answer: The bat
42. Question: What do you call a baby animal that is a kangaroo?
    • Answer: A joey
43. Question: What group of animals is a cold-blooded vertebrate that spends part of its life in water and part on land?
    • Answer: Amphibians
44. Question: What is the largest mammal in the world?
    • Answer: The Blue Whale
45. Question: How many hearts does an octopus have?
    • Answer: 3

Physics, Energy, & Inventions Science Trivia Questions for Kids

From electric current to the famous light bulb, let’s see how much science fun you can have with physics.

46. Question: Who is credited with inventing the incandescent light bulb?
    • Answer: Thomas Edison
47. Question: Gravity is the name of the force that pulls objects toward each other. Who formulated the theory of universal gravity?
    • Answer: Sir Isaac Newton
48. Question: What device is used to detect and measure radioactivity?
    • Answer: A Geiger counter
49. Question: What type of energy is stored in food and batteries?
    • Answer: Chemical energy
50. Question: What is the flow of electric charge called?
    • Answer: An electric current
51. Question: What is the boiling point of water in degrees fahrenheit at sea level?
    • Answer: 212°F (100°C)
52. Question: What is considered standard room temperature in Celsius?
    • Answer: Around 20°C to 22°C (68°F to 72°F)
53. Question: Who developed the theory of relativity?
    • Answer: Albert Einstein

Botany & Plants Science Trivia Questions for Kids

Let’s see what you know about the green world around us!

54. Question: What part of the plant conducts photosynthesis?
    • Answer: The leaf
55. Question: What is the flowering part of a plant primarily used for?
    • Answer: Reproduction
56. Question: What green pigment do plants use to trap light?
    • Answer: Chlorophyll
57. Question: What is the process by which plants make their own food?
    • Answer: Photosynthesis
58. Question: Which scientist famously studied evolution and natural selection?
    • Answer: Charles Darwin

Mixed Trivia & Fun Questions Science Trivia Questions for Kids

Let’s wrap up with some general science trivia questions perfect for younger kids and high school students alike.

59. Question: What are the three primary colors of light?
    • Answer: Red, Green, and Blue (RGB)
60. Question: Who was the first person to win two Nobel Prize awards in different scientific fields?
    • Answer: Marie Curie

Food Science & Kitchen Chemistry Science Trivia Questions for Kids

Exploring the science of what we eat is a fun way to introduce young minds to chemical reactions right at the dinner table.

61. Question: What is the main gas produced by yeast that causes bread dough to rise?
    • Answer: Carbon dioxide
62. Question: What popular breakfast food is a liquid that turns into a solid when you heat it up in a pan?
    • Answer: An egg (due to protein denaturation).
63. Question: True or False: A tomato is scientifically classified as a fruit, not a vegetable.
    • Answer: True (it develops from a flower and contains seeds).
64. Question: What makes pop rocks candy pop and fizz in your mouth in real time?
    • Answer: Trapped bubbles of high-pressure carbon dioxide gas inside the candy.
65. Question: Which vitamin, heavily present in oranges and lemons, prevents the disease scurvy?
    • Answer: Vitamin C
66. Question: What is the name of the process used to heat milk to a specific temperature to kill harmful bacteria?
    • Answer: Pasteurization
67. Question: Why do onions make you cry when you chop them?
    • Answer: Breaking the cells releases a sulfur-based gas that turns into a mild acid when it touches the water in your eyes.
68. Question: What basic ingredient is needed to turn milk into cheese or yogurt?
    • Answer: Bacteria (healthy cultures that ferment the milk lactose into lactic acid).
69. Question: What unique chemical property makes oil and water refuse to mix together on their own?
    • Answer: Water is a polar molecule and oil is non-polar, meaning they cannot form chemical bonds with each other.
70. Question: What substance gives hot chili peppers their spicy, burning kick?
    • Answer: Capsaicin

Science Equipment & Lab Tools Science Trivia Questions for Kids

Every great scientist needs the right tools! Let’s test your knowledge on the gear used in scientific topics.

71. Question: What tool uses lenses to make tiny objects, like white blood cells or bacteria, look much larger?
    • Answer: A microscope
72. Question: What is the name of the glass tube, open at one end and rounded at the other, used to hold small amounts of liquid for a chemical reaction?
    • Answer: A test tube
73. Question: If a scientist wants to measure the exact temperature of a liquid in degrees fahrenheit, what tool do they use?
    • Answer: A thermometer
74. Question: What is the name of the handheld tool used to pick up small objects that are too tiny for human fingers to grab easily?
    • Answer: Tweezers (or forceps)
75. Question: What instrument do astronomers use to look at distant objects in the solar system and the milky way galaxy?
    • Answer: A telescope
76. Question: What is the name of the triangular piece of glass that splits white light into a rainbow of colors?
    • Answer: A prism
77. Question: What special tool is used to measure out and drop very tiny, specific amounts of liquid?
    • Answer: A pipette (or dropper)
78. Question: What magnetic tool is used by scientists to find directions by pointing toward the Earth’s magnetic North Pole?
    • Answer: A compass
79. Question: What type of scale is used to measure the mass or weight of an object in a laboratory?
    • Answer: A digital balance (or laboratory scale)
80. Question: What safety gear must you always wear over your eyes to protect them during a messy science experiment?
    • Answer: Safety goggles

Science Experiments & Lab Safety Science Trivia Questions for Kids

Have you ever tried a hands-on classroom activity? These questions are all about famous experiments and how to stay safe.

81. Question: In the famous “Elephant Toothpaste” experiment, what rapid reaction causes the massive eruption of foam?
    • Answer: The rapid breakdown of hydrogen peroxide, which releases a massive amount of oxygen gas trapped in dish soap.
82. Question: When you drop Mentos candies into a bottle of Diet Coke, what physical process causes the soda geyser?
    • Answer: Nucleation (the bumpy surface of the candy allows carbon dioxide gas to rapidly form bubbles all at once).
83. Question: If you are testing liquids with litmus paper and the paper turns bright red, is the liquid an acid or a base?
    • Answer: An acid
84. Question: What happens to a balloon filled with air if you place it inside a very cold freezer?
    • Answer: It shrinks (because cold air molecules slow down, move closer together, and exert less pressure).
85. Question: In the classic volcano experiment, what household base reacts with vinegar (an acid) to create an explosion?
    • Answer: Baking soda
86. Question: True or False: It is completely safe to taste a liquid in a science lab as long as it looks like water.
    • Answer: False (never taste anything in a lab!).
87. Question: What everyday object can you rub against your hair to create static electricity and pick up tiny pieces of paper?
    • Answer: A balloon
88. Question: If you rub a metal needle against a magnet, what do you temporarily turn the needle into?
    • Answer: A magnet (temporary magnet)
89. Question: If an experiment requires water at its absolute boiling point of water in Celsius, what temperature should it read?
    • Answer: 100°C
90. Question: What simple kitchen ingredient can you dissolve into warm water to grow your own shiny crystals overnight?
    • Answer: Salt or sugar

General Science, Physics & Nature Science Trivia Questions for Kids

​A mix of good questions to test your critical thinking skills across physics and general knowledge.

91. Question: What invisible name of the force keeps our feet firmly planted on the ground and stops us from floating away?
    • Answer: Gravity
92. Question: Sound waves travel through the air to reach our ears. Can sound travel through the vacuum of outer space?
    • Answer: No (sound needs a medium like air or water to travel through).
93. Question: What type of rock is formed when molten lava cools down and hardens?
    • Answer: Igneous rock
94. Question: What spectacular natural event happens when static electricity builds up inside a storm cloud and discharges?
    • Answer: Lightning
95. Question: What is the hardest naturally occurring mineral found on Earth?
    • Answer: Diamond
96. Question: True or False: Light travels faster than sound.
    • Answer: True (this is why you see lightning before you hear the thunder!).
97. Question: What type of animal is a scientist studying if they are an entomologist?
    • Answer: Insects
98. Question: What does a plant’s root system absorb from the soil to help it grow?
    • Answer: Water and nutrients
99. Question: What is the term for an animal that only eats plants?
    • Answer: A herbivore
100. Question: What state of matter is a block of ice?
     • Answer: Solid

Science Trivia Questions for Kids is a great way to get students to recall information, be curious and work together to find the right answer. Asking Science Trivia Questions for Kids is a great way to start a lesson, end a lesson, or to run a fun lesson on its own.