Science Quiz
Physics, chemistry and biology — from atoms to ecosystems.
- Questions per game
- 25
- Question pool
- 127
- Time per question
- 50s
- Difficulty
- Mixed
About this Science quiz
The Science quiz is a timed trivia game. Each game gives you 25 questions, picked at random from a pool of 127 Science questions, so no two rounds are exactly the same. Every question has three answer options and one correct answer, and you have 50 seconds to choose. It is made for entertainment and quick learning: play a round, review the practice questions and answers on this page, then come back to beat your score.
What topics are included?
Test your knowledge of physics, chemistry, biology, space and everyday science. Questions range from the planets in our solar system and the parts of a cell to simple chemical formulas and how electricity works, so curious beginners and science fans alike will find something new to learn in every round.
What you'll learn
- Key facts, names and terms connected to Science
- How to recall information quickly under time pressure
- Which areas you already know well and which are worth revising
- Surprising details you can share with friends and family
Who is this quiz for?
This quiz is for anyone who enjoys Science trivia: students revising for school or competitive exams, quiz lovers looking for a quick daily brain workout, and fans who want to find out how much they really know. You can play on any phone, tablet or computer.
Difficulty level
Mixed. Questions range from easy warm-ups to tougher details, so every game has something for beginners and experts alike.
How scoring works
- 25 questions in every game.
- 50 seconds to answer each question.
- +20 points for a correct answer.
- −10 points for a wrong answer.
- Your first choice is final: answers cannot be changed.
- If the timer runs out, the game ends automatically.
- High scores appear on the Science leaderboard.
Science quiz questions and answers
20 practice questions from this category. Tap a question to reveal the correct answer and explanation.
1. What is the chemical symbol for water?
- • CO2
- • O2
- • H2O
Show answer
Correct answer: H2O
2. Which planet do we live on?
- • Earth
- • Venus
- • Mars
Show answer
Correct answer: Earth
3. What gas do humans need to breathe to survive?
- • Nitrogen
- • Oxygen
- • Carbon dioxide
Show answer
Correct answer: Oxygen
4. What is the powerhouse of the cell?
- • Nucleus
- • Mitochondria
- • Ribosome
Show answer
Correct answer: Mitochondria
5. Which force pulls objects towards the centre of the Earth?
- • Gravity
- • Friction
- • Magnetism
Show answer
Correct answer: Gravity
6. What is the most abundant gas in Earth’s atmosphere?
- • Oxygen
- • Nitrogen
- • Carbon dioxide
Show answer
Correct answer: Nitrogen
7. What do we call animals that eat both plants and meat?
- • Carnivores
- • Herbivores
- • Omnivores
Show answer
Correct answer: Omnivores
8. Which part of a plant carries out most photosynthesis?
- • Stem
- • Leaves
- • Roots
Show answer
Correct answer: Leaves
9. What is the speed of light approximately?
- • 150,000 km/s
- • 3,000 km/s
- • 300,000 km/s
Show answer
Correct answer: 300,000 km/s
10. Which scientist developed the theory of general relativity?
- • Galileo Galilei
- • Albert Einstein
- • Isaac Newton
Show answer
Correct answer: Albert Einstein
11. What is the chemical symbol for Hydrogen?
- • H
- • O
- • P
Show answer
Correct answer: H
12. Which element has the chemical symbol "H"?
- • Fluorine
- • Hydrogen
- • Chlorine
Show answer
Correct answer: Hydrogen
13. What is the chemical symbol for Helium?
- • Ne
- • K
- • He
Show answer
Correct answer: He
14. Which element has the chemical symbol "He"?
- • Helium
- • Sodium
- • Titanium
Show answer
Correct answer: Helium
15. What is the chemical symbol for Lithium?
- • Mg
- • Li
- • Mn
Show answer
Correct answer: Li
16. Which element has the chemical symbol "Li"?
- • Aluminium
- • Cobalt
- • Lithium
Show answer
Correct answer: Lithium
17. What is the chemical symbol for Beryllium?
- • Be
- • Si
- • Cu
Show answer
Correct answer: Be
18. Which element has the chemical symbol "Be"?
- • Phosphorus
- • Beryllium
- • Bromine
Show answer
Correct answer: Beryllium
19. What is the chemical symbol for Boron?
- • S
- • Ag
- • B
Show answer
Correct answer: B
20. Which element has the chemical symbol "B"?
- • Boron
- • Chlorine
- • Iodine
Show answer
Correct answer: Boron
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Science quiz FAQ
How many questions are in the Science quiz?
Each game has 25 multiple-choice questions, picked at random from a pool of 127 Science questions, so every round is a little different.
How does scoring work in the Science quiz?
You earn 20 points for every correct answer and lose 10 points for a wrong one. You have 50 seconds per question, and your answer is locked in as soon as you choose it.
Is the Science quiz free to play?
Yes. No real money is involved. Starting a game uses 10 virtual Gems, which are free in-game points you collect by playing and from the daily bonus.
Can I win real money?
No. Gems and points are virtual, have no cash value and cannot be exchanged for money. Game Gems is for entertainment and learning only.
How difficult is the Science quiz?
Mixed. Questions range from easy warm-ups to tougher details, so every game has something for beginners and experts alike.
Where can I see the correct answers?
The practice questions on this page include their correct answers. During a game, the correct answer is shown after every question, together with an explanation whenever one is available.