100 Science Quiz Questions

Ready to put your scientific knowledge to the test? This quiz covers a range of fascinating topics, from physics and biology to chemistry, space, and famous scientists. Perfect for trivia lovers in the UK, we’ve divided the questions into five rounds: General Science, Biology, Chemistry, Physics, and Space. Let’s dive in!


Round 1: General Science (1-20)

  1. What is the chemical symbol for water?
    H₂O

  1. What force keeps us on the ground?
    Gravity

  1. What is the largest organ in the human body?
    Skin

  1. What is the main gas in the Earth’s atmosphere?
    Nitrogen

  1. What is the boiling point of water in Celsius?
    100°C

  1. What planet is known as the Red Planet?
    Mars

  1. What is the name of the process plants use to make food?
    Photosynthesis

  1. Who proposed the theory of evolution by natural selection?
    Charles Darwin

  1. What is the hardest natural substance on Earth?
    Diamond

  1. What is the study of weather called?
    Meteorology

  1. What do bees collect from flowers to make honey?
    Nectar

  1. What part of the cell contains genetic material?
    Nucleus

  1. What is the smallest unit of matter?
    Atom

  1. Which scientist developed the three laws of motion?
    Isaac Newton

  1. What type of blood cells help fight infections?
    White blood cells

  1. What is the name of our galaxy?
    The Milky Way

  1. What element has the chemical symbol O?
    Oxygen

  1. What is the pH level of pure water?
    7 (neutral)

  1. What is the energy source for the Sun?
    Nuclear fusion

  1. What device is used to measure temperature?
    Thermometer

Round 2: Biology (21-40)

  1. What is the powerhouse of the cell?
    Mitochondria

  1. What type of blood group is known as the universal donor?
    O-negative

  1. What organ filters blood in the human body?
    Kidneys

  1. What is the study of fungi called?
    Mycology

  1. What is the largest type of whale?
    Blue whale

  1. Which part of the human brain controls balance?
    Cerebellum

  1. What is the largest land animal?
    African elephant

  1. What type of animal is a Komodo dragon?
    Lizard

  1. What process do animals use to release energy from food?
    Respiration

  1. What is the smallest bone in the human body?
    Stapes (in the ear)

  1. What is the main pigment in plants that absorbs sunlight?
    Chlorophyll

  1. What is the lifespan of a red blood cell?
    About 120 days

  1. What do herbivores primarily eat?
    Plants

  1. What is the name of the structure that carries genetic information?
    DNA (Deoxyribonucleic Acid)

  1. What animal is known as the King of the Jungle?
    Lion

  1. What is the fastest land animal?
    Cheetah

  1. What are the three main parts of the circulatory system?
    Heart, blood, and blood vessels

  1. What is the name of the largest bird?
    Ostrich

  1. What is the scientific term for the study of animals?
    Zoology

  1. What is the term for an animal that eats both plants and animals?
    Omnivore

Round 3: Chemistry (41-60)

  1. What is the chemical symbol for gold?
    Au

  1. What is the most abundant gas in the Earth’s atmosphere?
    Nitrogen

  1. What is the pH of an acidic solution?
    Less than 7

  1. What is the chemical formula for table salt?
    NaCl

  1. Who created the periodic table?
    Dmitri Mendeleev

  1. What is the lightest element?
    Hydrogen

  1. What is the process of turning a liquid into a gas called?
    Evaporation

  1. What is the chemical symbol for potassium?
    K

  1. What is the name of the element with the atomic number 8?
    Oxygen

  1. What element is commonly used in batteries?
    Lithium

  1. What type of bond is formed when atoms share electrons?
    Covalent bond

  1. What is the study of chemicals containing carbon called?
    Organic chemistry

  1. What is the most reactive group of elements in the periodic table?
    Halogens

  1. What is the main ingredient in glass?
    Silica (silicon dioxide)

  1. What gas do plants release during photosynthesis?
    Oxygen

  1. What is the chemical formula for methane?
    CH₄

  1. What acid is found in lemons and oranges?
    Citric acid

  1. What is the name of the compound commonly known as baking soda?
    Sodium bicarbonate

  1. What is the element symbol for mercury?
    Hg

  1. What does the pH scale measure?
    Acidity or alkalinity

Round 4: Physics (61-80)

  1. What is the speed of light in a vacuum?
    Approximately 299,792 km/s (or 186,282 miles/s)

  1. Who developed the theory of relativity?
    Albert Einstein

  1. What is the unit of force?
    Newton

  1. What is the force that opposes motion called?
    Friction

  1. What is the unit of electric current?
    Ampere (Amp)

  1. What is the first law of thermodynamics also known as?
    The law of conservation of energy

  1. What is the SI unit of energy?
    Joule

  1. What phenomenon causes the sky to appear blue?
    Rayleigh scattering

  1. What does E = mc² represent?
    Energy equals mass times the speed of light squared

  1. What is the term for the bending of light as it passes through a medium?
    Refraction

  1. What type of wave is sound?
    Longitudinal wave

  1. What is the name of the effect where an object moving towards you has a higher pitch?
    Doppler effect

  1. What is the gravitational acceleration on Earth?
    9.8 m/s²

  1. What is the name of the imaginary line that passes through the North and South Poles?
    Axis

  1. What is the name of the subatomic particle with no charge?
    Neutron

  1. What is the term for materials that allow electricity to flow through them?
    Conductors

  1. What is the study of motion called?
    Kinematics

  1. What is the principle that states pressure in a fluid decreases as its velocity increases?
    Bernoulli’s Principle

  1. What is the name of the process by which heat is transferred through direct contact?
    Conduction

  1. What is the term for the amount of space an object occupies?
    Volume

Round 5: Space (81-100)

  1. What is the largest planet in the Solar System?
    Jupiter

  1. What is the smallest planet in the Solar System?
    Mercury

  1. What is the name of the galaxy closest to the Milky Way?
    Andromeda Galaxy

  1. What planet is known for its rings?
    Saturn

  1. What is the name of the first manned spacecraft to land on the Moon?
    Apollo 11

  1. Who was the first man in space?
    Yuri Gagarin

  1. What is the Sun primarily made of?
    Hydrogen and helium

  1. What is the term for a star that has collapsed under its own gravity?
    Black hole

  1. What is the name of the rover that landed on Mars in 2021?
    Perseverance

  1. What is the name of the largest moon of Saturn?
    Titan

  1. What is the name of the force that causes tides?
    Gravitational force

  1. How many planets are in the Solar System?
    8

  1. What planet is known as Earth’s twin due to its size and composition?
    Venus

  1. What is the name of the spacecraft that provided the first close-up images of Pluto?
    New Horizons

  1. What is the term for a rocky body orbiting the Sun?
    Asteroid

  1. What is the term for the path of a celestial body around another?
    Orbit

  1. What is the farthest planet from the Sun?
    Neptune

  1. What is the name of the first artificial satellite launched into space?
    Sputnik 1

  1. What planet has the Great Red Spot?
    Jupiter

  1. What is the study of stars, planets, and galaxies called?
    Astronomy

Conclusion

That’s 100 science quiz questions covering everything from biology and chemistry to physics and space! Perfect for trivia nights or challenging your friends, these questions are sure to test your scientific smarts. Let me know if you’d like to tweak or expand the quiz further!

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