🔬 Science Archive

Science Trivia Questions & Answers

12 curated science trivia questions with answers and fun facts. Read them below, then test yourself in the live Science arena.

  1. 1. What is the hardest known natural substance found on Earth?

    Answer: Diamond easy

    Diamonds form about 100 miles beneath Earth's surface under extreme heat and pressure.

  2. 2. What is the chemical formula for water?

    Answer: H2O easy

    Each water molecule has two hydrogen atoms and one oxygen atom.

  3. 3. How many planets are there in our Solar System?

    Answer: Eight easy

    Pluto was reclassified as a dwarf planet in 2006.

  4. 4. Which planet is known as the Red Planet?

    Answer: Mars easy

    Mars looks red because of iron oxide (rust) on its surface.

  5. 5. What is the chemical symbol for gold?

    Answer: Au medium

    The symbol comes from the Latin word 'aurum'.

  6. 6. Which scientist developed the theory of general relativity?

    Answer: Albert Einstein easy

    Einstein published the theory in 1915.

  7. 7. Which part of the cell is known as its powerhouse?

    Answer: Mitochondria easy

    Mitochondria generate most of the cell's energy as ATP.

  8. 8. What is the most abundant gas in Earth's atmosphere?

    Answer: Nitrogen medium

    Nitrogen makes up about 78% of the atmosphere.

  9. 9. Which force keeps the planets in orbit around the Sun?

    Answer: Gravity easy

    Newton described gravity in the 17th century.

  10. 10. How many bones are in the adult human body?

    Answer: 206 medium

    Babies are born with around 300 bones, many of which fuse over time.

  11. 11. What gas do plants absorb from the air for photosynthesis?

    Answer: Carbon dioxide easy

    Plants release oxygen as a by-product of photosynthesis.

  12. 12. What is the pH value of a neutral substance such as pure water?

    Answer: 7 medium

    Values below 7 are acidic and above 7 are alkaline.