120 Science Riddles with Answers (2024 Updated)

I can split light into colors, a rainbow you’ll see, Though I am made of glass, it’s not me, just physics, you see. Who am I?

I’m in every breath you take, yet you cannot see, Essential for life, I flow through every tree. What am I?

I orbit the sun but I am not a planet, My icy core has a bright, fiery tenant. What am I?

I keep the planets aligned, but you can’t see me, My force holds you down, but I’m invisible as can be. What am I?

I am tiny and round, with electrons that whirl, Inside every atom, I make the world twirl. What am I?

I have a twin but look nothing like me, I can burn or melt you, in a solid, liquid, or gas form I can be. What am I?

I’m the path that light takes, bending when I’m dense, A scientist’s delight, in me, rays make sense. What am I?

I’m at the heart of the storm, but quiet as can be, In a spinning spiral, I hold the key. What am I?

I’m a spark in the sky, a bolt from the blue, I’m fast as light, but thunder follows through. What am I?

I grow when it’s cold, shrink when it’s hot, In winter you’ll find me, in summer you’ll not. What am I?

I’m a giant ball of gas, burning bright in the sky, Without me, the Earth would wither and die. What am I?

I make water wet, and fires burn bright, With a symbol O, I’m in your every breath, day and night. What am I?

I’m a theory of space, with black holes at my heart, Einstein’s great idea, I tear galaxies apart. What am I?

I live in the air, but I can’t be seen, I’m needed for photosynthesis, to keep the earth green. What am I?

I am the sound you hear when the storm is near, But by the time I arrive, you’ve seen my friend, clear. What am I?

I am the smallest unit of life, in you and me, I build your organs, tissues, and blood cells with glee. What am I?

I can be a liquid, solid, or gas, My molecules move fast, or slow with class. What am I?

I’m a chemical reaction, with bubbles in sight, When acid meets base, I make things light. What am I?

I’m the speed limit of the universe, nothing can go past, I’m faster than sound, but slower than thought fast. What am I?

I’m the study of numbers, shapes, and more, From adding to algebra, I open the door. What am I?

I’m a type of energy that’s everywhere you look, From the sun to the stove, I’m by the book. What am I?

I keep your body moving, your heart on beat, Without me, you’d find it hard to compete. What am I?

I’m a particle so small, you’ll need a collider, To see me in action, as I make physics wider. What am I?

I’m the bond that holds you together, tight as glue, Without me, molecules wouldn’t stick, that’s true. What am I?

I’m the invisible shield that keeps you from frying, Without me, UV rays would have you crying. What am I?

I’m the smallest part of every element, I make up everything, from oxygen to cement. What am I?

I’m a force that slows you down, when you slide, I make things rough, no matter how hard you try. What am I?

I’m a branch of science that studies the mind, From thoughts to feelings, my theories you’ll find. What am I?

I’m a state of matter that’s neither solid nor gas, My molecules move freely, in any class. What am I?

I’m the invisible push or pull, in every action I’m known, I make things move, even when I’m not shown. What am I?

I help plants turn sunlight into food they can store, Without me, their energy would be no more. What am I?

I’m the process that changes water to cloud, From liquid to gas, I make skies proud. What am I?

I’m in the center of the Earth, hot and dense, I’m made of iron and nickel, under immense suspense. What am I?

I’m a chemical bond, sharing electrons tight, I hold molecules together with all my might. What am I?

I’m a tiny organ inside a cell, I package proteins and ship them well. What am I?

I’m the measure of heat, or lack thereof, In Celsius or Fahrenheit, I show your stuff. What am I?

I’m the smallest particle with the properties of an element, Combine me with others, and compounds are sent. What am I?

I’m the blueprint of life, found in each cell, With my double helix, I have a story to tell. What am I?

I’m the process that plants use to grow, Taking in sunlight, in me they glow. What am I?

I’m a type of energy, stored but not in motion, I’m potential waiting, with no outward emotion. What am I?

I’m the invisible thread that pulls objects near, Though you can’t see me, I’m always here. What am I?

I travel faster than anything known, Yet, you can never see me alone. What am I?

I can make things fall, or I can make them fly, My laws govern motion, low or high. What am I?

I’m the distance between waves, sometimes long, sometimes short, In light and sound, my measure is of great import. What am I?

I bend light when it passes through me, splitting it wide, I show the spectrum on the other side. What am I?

I am the force that opposes motion, slowing you down, On every surface, I can be found. What am I?

I’m the point where light rays meet, in mirrors and lenses, Whether concave or convex, I’m full of tenses. What am I?

I’m a type of energy, in motion I’m seen, From moving objects to wind, I’m keen. What am I?

I’m the reason you see blue skies above, Scattering light, from air I shove. What am I?

I’m the push or pull that can change your speed, With every action, I plant the seed. What am I?

I’m the force that can crush or expand, In every gas, liquid, and solid, I stand. What am I?

I’m the curve that you see in liquids in a tube, Concave or convex, I can be a rube. What am I?

I’m the energy stored in objects at height, Release me, and I turn into flight. What am I?

I’m the invisible layer protecting Earth’s sphere, Filtering radiation, I keep danger near. What am I?

I’m a quantum leap, an electron’s flight, Jumping between orbits, I change with light. What am I?

I’m the space around a charged particle, you see, Where force is felt, and electric fields be. What am I?

I’m the sum of energy in motion and at rest, In every object, I’m put to the test. What am I?

I’m the phenomenon that shifts the sound you hear, As the source moves close or far, I’m near. What am I?

I’m the force in a circuit, pushing electrons along, Without me, the current wouldn’t be strong. What am I?

I’m the point where a solid turns to liquid state, At this temperature, change awaits. What am I?

I am the lightest element, I float up high, In stars and balloons, I touch the sky. What am I?

I’m a table, but not for meals, With elements and symbols, I reveal. What am I?

I’m a bond that shares electrons tight, Forming molecules that are just right. What am I?

I’m a gas that plants need to grow, Through photosynthesis, I help them glow. What am I?

I’m in your kitchen, a common acid indeed, I make your food taste right, just what you need. What am I?

I’m the reaction that releases heat, Exothermic is my name, I’m hard to beat. What am I?

I’m a shiny metal, soft and light, I react with water, a fiery sight. What am I?

I’m a molecule made of two, When I meet a spark, I explode for you. What am I?

I am the pH level that’s neutral, Neither acidic nor basic, I’m central. What am I?

I’m the number of atoms in a mole, Avogadro’s constant is my goal. What am I?

I’m an acid found in citrus fruit, With a sour taste, I’m quite astute. What am I?

I’m the state of matter that takes no shape, I fill any container, without escape. What am I?

I’m the process that splits water apart, Creating hydrogen and oxygen, a science start. What am I?

I’m the lightest metal, found in batteries too, When it comes to energy, I’m always true. What am I?

I’m a substance that speeds up a reaction, Without being consumed, I cause satisfaction. What am I?

I’m a color change in a chemical test, Showing acidity or base, I do my best. What am I?

I’m a gas that makes balloons rise, With my lightness, I touch the skies. What am I?

I’m a solution with ions that split, Conducting electricity, I’m a hit. What am I?

I’m a reaction that takes in heat, Endothermic is my name, I’m cool and neat. What am I?

I’m a type of bond that forms in salts, With a transfer of electrons, I have no faults. What am I?

I’m the powerhouse of the cell, generating energy, With ATP, I fuel life’s synergy. What am I?

I carry oxygen in your blood, making it red, Without me, your cells would be dead. What am I?

I’m the part of the plant that drinks from the ground, Through me, water and nutrients are found. What am I?

I’m a green pigment in leaves that’s bright, I turn sunlight into energy, just right. What am I?

I’m the process where cells divide, creating two, With mitosis or meiosis, life renews. What am I?

I’m the basic building block of life, you see, In every organism, you’ll find me. What am I?

I’m the part of the brain that helps you think, In logic, memory, I’m the link. What am I?

I’m the system that defends you from harm, With white blood cells, I raise the alarm. What am I?

I’m the structure that holds your body tall, Made of bones, I support it all. What am I?

I’m the part of a plant where seeds are made, Pollinators visit me, where I’m displayed. What am I?

I’m the organ that pumps blood through your veins, Keeping you alive with every beat’s gains. What am I?

I’m the genetic material, passed from parent to child, With double helix strands, I’m quite wild. What am I?

I’m the process that plants use to make food, With sunlight and CO2, I’m in the mood. What am I?

I’m the part of the cell that controls it all, With chromosomes inside, I’m not too small. What am I?

I’m the type of reproduction that needs two to dance, In plants and animals, I give offspring a chance. What am I?

I’m the liquid part of blood, yellow and clear, Carrying nutrients and waste, I’m quite dear. What am I?

I’m the tiny structures that filter your blood, Removing waste, I do it good. What am I?

I’m the process that breaks down food for fuel, In your stomach and intestines, I rule. What am I?

I’m the part of the eye that adjusts the light, Focusing images, making them right. What am I?

I’m the process where muscles contract, With actin and myosin, that’s a fact. What am I?

I’m the brain of the computer, processing all that’s fed, From logic to arithmetic, I’m the head. What am I?

I store data long-term, even when the power’s out, In me, your files and photos are stout. What am I?

I’m the coding language that’s old but gold, With low-level access, I’m bold. What am I?

I’m the virtual place where your programs run, Allocating memory and space, I’m fun. What am I?

I’m the loop that never ends, a programmer’s nightmare, Without a condition, I’m always there. What am I?

I’m a collection of rules, guiding data’s way, Through networks and cables, I make connections stay. What am I?

I’m the 1s and 0s, the language of the machine, In binary form, I’m unseen. What am I?

I’m the first step in troubleshooting code, Removing me can make it explode. What am I?

I’m the technique used to solve problems step by step, In algorithms, I take the prep. What am I?

I’m a small piece of data, a single unit stored, In bits and bytes, I’m adored. What am I?

I’m the process of protecting data from prying eyes, With encryption, I make sure it flies. What am I?

I’m the interface that makes things click, Between humans and machines, I’m quick. What am I?

I’m the process of fetching and decoding instructions, Executing them in perfect junctions. What am I?

I’m the storage that’s fast but volatile too, When power’s off, I bid adieu. What am I?

I’m the part of the computer that’s hard and tough, Holding all the components, I’m rough. What am I?

I’m the method of testing software piece by piece, Ensuring each part’s stability and peace. What am I?

I’m a protocol that’s used to surf the web, Transmitting data, no need to dread. What am I?

I’m a technique that makes slow computers quick, Splitting tasks across cores, I’m slick. What am I?

I’m the method used to search through data, Sorting things fast, I’m the creator’s beta. What am I?

I’m a concept where tasks share a slice of time, Switching between them, I keep things prime. What am I?