25 Science Trivia Questions
Space, biology, chemistry, and everyday physics all feature in these science trivia questions. Start a random round below, or read the full bank with the answers hidden until you want them.
What is the chemical symbol for oxygen?
easy
What organ pumps blood throughout the human body?
easy
At what temperature does water freeze in degrees Celsius?
easy
What is the largest planet in our solar system?
easy
What gas do humans need to breathe to survive?
easy
Which scientist proposed the theory of general relativity?
medium
Which planet do we live on?
easy
What is the study of living organisms called?
easy
What is the center of an atom called?
medium
What is the chemical symbol for sodium?
hard
Answer key
- O
- Heart
- 0
- Jupiter
- Oxygen
- Albert Einstein
- Earth
- Biology
- Nucleus
- Na
All 25 Science Trivia Questions
The complete bank. Click any question to reveal its answer.
1What is the chemical symbol for water?easy
Answer: H2O
2What planet is known as the Red Planet?easy
Answer: Mars
3What gas do plants absorb from the air for photosynthesis?easy
Answer: Carbon dioxide
4How many planets are in our solar system?easy
Answer: Eight
5What is the largest planet in our solar system?easy
Answer: Jupiter
6What is the chemical symbol for gold?medium
Answer: Au
7What force pulls objects toward the center of the Earth?easy
Answer: Gravity
8What is the closest planet to the Sun?easy
Answer: Mercury
9What is the powerhouse of the cell?medium
Answer: Mitochondria
10What gas do humans need to breathe to survive?easy
Answer: Oxygen
11What is the hardest known natural substance?medium
Answer: Diamond
12At what temperature does water freeze in degrees Celsius?easy
Answer: 0
13What is the center of an atom called?medium
Answer: Nucleus
14Which planet is famous for its prominent ring system?easy
Answer: Saturn
15What is the chemical symbol for oxygen?easy
Answer: O
16What do we call animals that eat only plants?easy
Answer: Herbivores
17What is the study of living organisms called?easy
Answer: Biology
18How many bones are in the adult human body?hard
Answer: 206
19What is the boiling point of water at sea level in degrees Celsius?easy
Answer: 100
20What part of the plant conducts photosynthesis?medium
Answer: Leaves
21What is the speed of light commonly rounded to (km per second)?hard
Answer: 300,000
22Which scientist proposed the theory of general relativity?medium
Answer: Albert Einstein
23What is the chemical symbol for sodium?hard
Answer: Na
24What organ pumps blood throughout the human body?easy
Answer: Heart
25Which planet do we live on?easy
Answer: Earth
How to Use These Science Trivia Questions
For a classroom warm-up, generate five questions and project the page — reveal each answer once players commit. For a party or pub quiz, generate a longer round and print it: the questions come out on the sheet and the answer key prints on its own page at the end, so the quizmaster keeps the answers and hands out the rest. Want a broader mix? The full trivia generator pulls from all eight categories at once.
Frequently Asked Questions
How many science trivia questions are there?
This page has 25 hand-checked, family-friendly science trivia questions questions. Each quick round pulls a fresh random selection, so you can play again and again.
Are these science trivia questions free?
Yes — completely free, with no signup and no limit. Everything runs in your browser.
Can I print the science trivia questions quiz?
Yes. Generate a round and use the print button; the questions print as a clean sheet with the answer key on its own page at the end.
Are the questions suitable for kids?
Yes. Every question is rated G and family-friendly, and the easy tier is written for elementary-age players.