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Can You Pass This Science Quiz? 33 Questions Everyone Should Know

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Can You Pass This Science Quiz? 33 Questions Everyone Should Know

About this quiz

Science quiz: 33 general science questions about physics, chemistry, biology and our planet that everyone learned at school. 🔬

From atoms to rainbows and liquid metals to the closest star, find out how much of your school science you still remember, then learn the surprising fact behind each answer. Great for family quiz nights, road trips and classrooms.

❓ IN THIS QUIZ

  • What is the closest star to Earth?
  • Which metal is liquid at room temperature?
  • At what temperature are Celsius and Fahrenheit exactly the same?
  • Which is heavier: a kilogram of feathers or a kilogram of steel?

💬 How many did you get right? Tell us your score in the comments. What was your favorite subject at school?

How to play

  1. Read the question and look at the pictures.
  2. Pick your answer before the timer runs out (or switch the timer off).
  3. See if you were right and read the fun fact.
Answers and fun facts (spoilers!)
  1. Let's warm up! What is the closest star to Earth?
    The Sun
    The Sun is a star, and it holds about 99.8% of all the mass in our solar system!
  2. What is H2O?
    Water
    H2O means two hydrogen atoms joined to one oxygen atom.
  3. At sea level, at what temperature does water boil?
    100 °C (212 °F)
    At sea level water boils at 100 °C (212 °F).
  4. What gas do plants take in from the air to make food?
    Carbon dioxide
    Plants take in carbon dioxide and give out oxygen. Thanks, plants!
  5. Which gas makes up most of the air we breathe?
    Nitrogen
    Air is about 78% nitrogen and only about 21% oxygen!
  6. What force pulls things down to the ground?
    Gravity
    Gravity keeps the Moon circling Earth and Earth circling the Sun!
  7. Which travels faster: light or sound?
    Light
    Light is far faster, which is why you see lightning before you hear thunder!
  8. What is the center of an atom called?
    Nucleus
    An atom is mostly empty space. The tiny nucleus holds almost all of its mass!
  9. What is the hardest natural material?
    Diamond
    Diamond is pure carbon, the same element as the graphite in your pencil!
  10. What is the chemical symbol for gold?
    Au
    Au comes from 'aurum', the Latin word for gold!
  11. What kind of animal is a whale?
    Mammal
    Whales breathe air and feed their babies milk, just like other mammals!
  12. Which part of a cell turns food into energy?
    Mitochondria
    Mitochondria are the 'powerhouse of the cell'!
  13. What makes a rainbow?
    Sunlight in raindrops
    Raindrops bend sunlight and split it into its colors!
  14. At what temperature does water freeze?
    0 °C (32 °F)
    Pure water freezes at 0 °C (32 °F). Salt makes it freeze at a lower temperature, so roads get salted in winter!
  15. What is a baby frog called?
    Tadpole
    Tadpoles breathe with gills, then grow legs and lungs as they become frogs!
  16. What is the pH of pure water?
    7
    Pure water is neutral at pH 7. Lemon juice is acidic, soap is basic!
  17. What is the unit of force?
    Newton
    The newton is named after Isaac Newton, who described the laws of motion.
  18. Which metal is liquid at room temperature?
    Mercury
    Mercury is the only metal that is liquid at room temperature!
  19. Sound cannot travel through which of these?
    Space
    Sound needs something to travel through, so space is completely silent!
  20. What is the center of the Earth called?
    Core
    Earth's inner core is a solid ball made mostly of iron and nickel.
  21. Which of these does a magnet attract?
    Iron nail
    Magnets attract iron, but not aluminium or copper!
  22. Who is famous for the theory of evolution by natural selection?
    Charles Darwin
    Darwin published On the Origin of Species in 1859.
  23. Who discovered penicillin?
    Alexander Fleming
    In 1928 Fleming noticed that mould was killing the bacteria in his dish!
  24. Who came up with E equals m c squared?
    Albert Einstein
    It shows that a tiny amount of mass holds a huge amount of energy.
  25. What is the lightest element?
    Hydrogen
    Hydrogen is the lightest element and the most common one in the universe!
  26. What is the study of earthquakes called?
    Seismology
    Seismologists use seismometers to measure how the ground shakes.
  27. About how fast does light travel?
    300,000 km/s
    Light could travel around the Earth about 7.5 times in one second!
  28. Which part of a plant makes the seeds?
    Flower
    Flowers make seeds, often with a little help from bees!
  29. Rub a balloon on your hair and it stands up. Why?
    Static electricity
    Rubbing moves tiny electrons around, building up static electricity!
  30. At what temperature are Celsius and Fahrenheit exactly the same?
    -40°
    -40 °C is exactly -40 °F, the only temperature where both scales match!
  31. How long does sunlight take to reach Earth?
    About 8 minutes
    Sunlight takes about 8 minutes 19 seconds to reach us. You always see the Sun as it was 8 minutes ago!
  32. Which element is most common in Earth's crust?
    Oxygen
    Oxygen! It's locked inside rocks and minerals and makes up almost half the crust.
  33. Final question! Which is heavier: a kilogram of feathers or a kilogram of steel?
    The same
    A kilogram is a kilogram! The feathers just take up much more space.