• Question: What has keys but can’t open locks?
• Answer: A piano.
• Question: What has a heart but no other organs?
• Answer: Artichoke.
• Question: What travels around the world but stays in one corner?
• Answer: A stamp.
• Question: What has cities but no houses, forests, or rivers?
• Answer: A map.
• Question: What has hands but cannot clap?
• Answer: A clock.
• Question: What can fill a room but takes up no space?
• Answer: Light.
• Question: What has a head, a tail, is brown, and has no legs?
• Answer: A penny.
• Question: What gets wetter as it dries?
• Answer: A towel.
• Question: What has teeth but can’t eat?
• Answer: A comb.
• Question: What runs but never walks, murmurs but never talks, has a bed but never sleeps?
• Answer: A river.
• Question: What has many keys but can’t open a single lock?
• Answer: A computer keyboard.
• Question: What has no beginning, end, or middle?
• Answer: A doughnut.
• Question: What has a thumb and four fingers but is not alive?
• Answer: A glove.
• Question: What has a neck but no head?
• Answer: A bottle.
• Question: What is full of holes but still holds water?
• Answer: A sponge.
• Question: What can you catch but not throw?
• Answer: A cold.
• Question: What can travel around the world while staying in a corner?
• Answer: A stamp.
• Question: What has keys that open no locks, space but no room, and allows you to enter but not go outside?
• Answer: A keyboard.
• Question: What has hands but cannot clap?
• Answer: A clock.

• Question: What has a nucleus but no protons or neutrons?
• Answer: An atom of hydrogen.
• Question: What has waves but no water?
• Answer: Light.
• Question: What can be cracked, made, told, and played?
• Answer: A joke.
• Question: What has branches but no leaves or bark?
• Answer: A family tree.
• Question: What can fly without wings?
• Answer: Time.
• Question: What has a tail but no body?
• Answer: A comet.
• Question: What is filled with air, yet it can weigh a lot?
• Answer: A balloon.
• Question: What is full of holes but still holds gas?
• Answer: A sponge.
• Question: What has no weight, can be seen by the naked eye, and if you put it in a barrel, it will make the barrel lighter?
• Answer: A hole.
• Question: What has eyes but cannot see?
• Answer: A potato.
• Question: What is always in front of you but can’t be seen?
• Answer: The future.
• Question: What is so fragile that saying its name breaks it?
• Answer: Silence.
• Question: What has a mouth but doesn’t eat, moves but has no feet, and is always on the move?
• Answer: A river.
• Question: What has keys but can’t open locks, has space but no room, and allows you to enter but not go outside?
• Answer: A keyboard.
• Question: What is it that you can break but is still never held?
• Answer: A promise.
• Question: What has a tail and a head but no body?
• Answer: A coin.
• Question: What has roots as nobody sees, is taller than trees, up, up it goes, and yet never grows?
• Answer: A mountain.

Another Science riddles

• Question: What has wings but never flies?
• Answer: A book.
• Question: What has a tail and a head but no body?
• Answer: A coin.
• Question: What has a face but no eyes, hands but no arms?
• Answer: A clock.
• Question: What has a ring but no finger?
• Answer: Saturn.
• Question: What can you catch but never throw?
• Answer: A cold.
• Question: What has keys that open no locks, space but no room, and allows you to enter but not go outside?
• Answer: A keyboard.
• Question: What has a head and a tail but no body?
• Answer: A coin.
• Question: What has hands but cannot clap?
• Answer: A clock.
• Question: What can travel around the world while staying in a corner?
• Answer: A stamp.
• Question: What has a neck but no head?
• Answer: A bottle.
• Question: What can fill a room but takes up no space?
• Answer: Light.
• Question: What can you hold without ever touching or using your hands?
• Answer: Your breath.
• Question: What has roots nobody sees, is taller than trees, up, up it goes, and yet never grows?
• Answer: A mountain.
• Question: What has one eye but cannot see?
• Answer: A needle.
• Question: What can be swallowed but can also swallow you?
• Answer: Pride.
• Question: What has keys but can’t open locks?
• Answer: A piano.

• What is the powerhouse of the cell? (Mitochondria)
• What force keeps planets in orbit around the sun? (Gravity)
• What substance, essential for life, is known chemically as H2O? (Water)
• What process do plants use to make their food? (Photosynthesis)
• What is the smallest unit of matter? (Atom)
• What type of energy is stored in food? (Chemical energy)
• What is the process by which plants release water vapor into the air? (Transpiration)
• What causes the tides on Earth? (Gravitational pull of the Moon)
• What is the study of Earth’s atmosphere called? (Meteorology)
• What is the Earth’s outermost layer called? (Crust)
• What is the hardest natural substance found on Earth? (Diamond)
• What is the study of fossils called? (Paleontology)
• What phenomenon causes the sky to appear blue? (Rayleigh scattering)
• What unit is used to measure electric current? (Ampere)
• What causes the rainbow’s spectrum of colors? (Refraction and dispersion of light)
• What is the Earth’s primary source of energy? (The Sun)
• What part of the atom has a negative charge? (Electron)
• What is the main component of Earth’s atmosphere? (Nitrogen)
• What is the process by which plants take in carbon dioxide and release oxygen? (Respiration)
• What is the force that opposes the motion of objects through air? (Drag)

Getting over with Science riddles

• What is the study of heredity and variation in organisms called? (Genetics)
• What is the process by which plants bend toward light called? (Phototropism)
• What is the center of an atom called, where protons and neutrons are located? (Nucleus)
• What is the unit used to measure the intensity of sound? (Decibel)
• What is the process by which rocks are broken down into smaller particles called? (Weathering)
• What is the branch of science that deals with the study of living organisms called? (Biology)
• What is the process by which water vapor turns into liquid water called? (Condensation)
• What is the study of the Earth’s physical structure and substance called? (Geology)
• What is the force that opposes the relative motion of two surfaces in contact with each other? (Friction)
• What is the process by which plants lose water vapor through their leaves? (Evapotranspiration)
• What is the process by which a liquid turns into a gas at its boiling point throughout the liquid? (Boiling)
• What is the force that attracts two masses toward each other? (Gravity)
• What is the process by which organisms maintain a stable internal environment? (Homeostasis)
• What is the unit used to measure the amount of electric charge? (Coulomb)
• What is the branch of science that deals with the study of matter and its motion through space and time? (Physics)
• What is the process by which plants absorb water through their roots? (Osmosis)
• What is the process by which an organism develops from a single-celled zygote into a complete organism? (Development)
• What is the process by which rocks are formed from pre-existing rocks due to changes in temperature and pressure? (Metamorphism)
• What is the measure of the amount of matter in an object? (Mass)
• What is the process by which plants and animals produce offspring similar to themselves? (Reproduction)