Science Trivia Questions and Answers
Science trivia questions covering biology, chemistry, physics, space, and earth science. Great for a quiz night or a quick study session.
1 Question: What is the chemical symbol for gold?
Answer: Au
2 Question: How many bones are in the adult human body?
Answer: 206
3 Question: What planet is known as the Red Planet?
Answer: Mars
4 Question: What is the powerhouse of the cell?
Answer: Mitochondria
5 Question: What gas do plants absorb from the atmosphere during photosynthesis?
Answer: Carbon dioxide
6 Question: What is the boiling point of water in Celsius?
Answer: 100°C
7 Question: Who developed the theory of general relativity?
Answer: Albert Einstein
8 Question: What is the most abundant element in the universe?
Answer: Hydrogen
9 Question: How many elements are on the periodic table?
Answer: 118
10 Question: What is the smallest unit of an element that retains its chemical properties?
Answer: Atom
11 Question: What organ produces insulin?
Answer: Pancreas
12 Question: What is the chemical formula for table salt?
Answer: NaCl
13 Question: What is the most abundant gas in Earth's atmosphere?
Answer: Nitrogen
14 Question: What is the study of earthquakes called?
Answer: Seismology
15 Question: What color is chlorophyll?
Answer: Green
16 Question: What is the atomic number of carbon?
Answer: 6
17 Question: What type of rock is formed from cooling lava?
Answer: Igneous rock
18 Question: What is the hardest natural substance on Earth?
Answer: Diamond
19 Question: What is the name of the process by which liquid water changes to gas?
Answer: Evaporation
20 Question: What is the closest star to Earth?
Answer: The Sun
21 Question: What layer of Earth is directly below the crust?
Answer: Mantle
22 Question: What does DNA stand for?
Answer: Deoxyribonucleic acid
23 Question: What is the name of the upward force exerted on an object submerged in liquid?
Answer: Buoyancy
24 Question: What is the chemical symbol for silver?
Answer: Ag
25 Question: What force keeps planets in orbit around the sun?
Answer: Gravity
26 Question: What is the name of the process by which cells divide?
Answer: Mitosis
27 Question: Approximately how fast does light travel per second?
Answer: 299,792,458 m/s
28 Question: What is the largest organ in the human body?
Answer: Skin
29 Question: What element is denoted by the symbol 'O'?
Answer: Oxygen
30 Question: What is absolute zero in Celsius?
Answer: -273.15°C
31 Question: What is the name of the force opposing motion between surfaces?
Answer: Friction
32 Question: What is the only metal that is liquid at room temperature?
Answer: Mercury
33 Question: What part of the eye controls how much light enters?
Answer: The iris
34 Question: What is the chemical symbol for potassium?
Answer: K
35 Question: What is the most abundant protein in the human body?
Answer: Collagen
36 Question: What planet has the most moons in our solar system?
Answer: Saturn
37 Question: What is the name of the tube connecting the throat to the stomach?
Answer: Esophagus
38 Question: What two gases make up most of Earth's atmosphere?
Answer: Nitrogen and oxygen
39 Question: What is the chemical symbol for sodium?
Answer: Na
40 Question: How many chromosomes do humans have?
Answer: 46
41 Question: What is the most common element in the Earth's crust?
Answer: Oxygen
42 Question: What is the chemical symbol for lead?
Answer: Pb
43 Question: What is the SI unit of electrical resistance?
Answer: Ohm
44 Question: How many chambers does the human heart have?
Answer: Four
45 Question: What is the name of the nerve that connects the eye to the brain?
Answer: Optic nerve
46 Question: What is the name of the largest moon of Saturn?
Answer: Titan
47 Question: What element has the chemical symbol Fe?
Answer: Iron
48 Question: What is the name of the reaction that powers the sun?
Answer: Nuclear fusion
49 Question: What is the scientific name for the kneecap?
Answer: Patella
50 Question: What type of lens is thicker in the middle than at the edges?
Answer: Convex lens
51 Question: What is the name of the first space shuttle to go into orbit?
Answer: Columbia
52 Question: What is the human body's most abundant mineral?
Answer: Calcium
53 Question: What is the name of the scale used to measure mineral hardness?
Answer: Mohs scale
54 Question: What blood type is the universal donor?
Answer: O negative
55 Question: What is the name of the first space station launched by the Soviet Union?
Answer: Salyut 1
56 Question: What planet has a storm called the Great Red Spot?
Answer: Jupiter
57 Question: What organ filters waste from the blood and produces urine?
Answer: Kidneys
58 Question: What is the chemical formula for carbon dioxide?
Answer: CO₂
59 Question: What is the name of the layer of the atmosphere that absorbs UV radiation?
Answer: Ozone layer
60 Question: What is the chemical symbol for nitrogen?
Answer: N
61 Question: What is the term for animals that eat only plants?
Answer: Herbivore
62 Question: What is the term for animals that eat both plants and meat?
Answer: Omnivore
63 Question: What is the name of the scientist who first described natural selection?
Answer: Charles Darwin
64 Question: What is the approximate distance from Earth to the Sun in miles?
Answer: 93 million miles
65 Question: What is the only planet in our solar system less dense than water?
Answer: Saturn
66 Question: What vitamin does the human body produce when exposed to sunlight?
Answer: Vitamin D
67 Question: What organ produces bile to help digest fat?
Answer: Liver
68 Question: What is the name of the protein that gives skin and hair their color?
Answer: Melanin
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Frequently Asked Questions
What are good science trivia questions?
Good science trivia questions stick to facts with definitive answers: chemical symbols, planets, human anatomy, and famous scientists. Avoid anything where the science is still evolving — the best questions are ones a quizmaster can defend when a table disputes the answer.
How many trivia questions should a pub quiz have?
A standard pub quiz has between 40 and 60 questions, typically organized into 4-6 rounds of 8-10 questions each. Most trivia nights run 60-90 minutes, so 40-50 questions is the sweet spot. Each round should mix easy and harder questions so every team scores some points.
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