50+ Science Trivia Questions (With Answers)

Explore the wonders of science with these trivia questions! From the depths of the ocean to the far reaches of space, test your scientific knowledge.

Easy Science Questions

1.

What is the chemical symbol for water?

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Answer: H2O

2.

What planet is known as the Red Planet?

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Answer: Mars

3.

What is the largest planet in our solar system?

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Answer: Jupiter

4.

What gas do plants need for photosynthesis?

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Answer: Carbon dioxide

5.

What is the smallest unit of life?

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Answer: Cell

6.

What is the speed of light?

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Answer: 299,792 km/s

7.

What is the center of an atom called?

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Answer: Nucleus

8.

What is the hardest natural substance?

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Answer: Diamond

9.

What force keeps planets in orbit?

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Answer: Gravity

10.

What is the boiling point of water in Celsius?

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Answer: 100 degrees

11.

What is the chemical symbol for oxygen?

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Answer: O

12.

What is the closest star to Earth?

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Answer: The Sun

13.

What is DNA short for?

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Answer: Deoxyribonucleic acid

14.

What is the study of rocks called?

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Answer: Geology

15.

What is the largest organ in the human body?

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Answer: Skin

16.

What is the chemical symbol for sodium?

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Answer: Na

17.

What is the smallest bone in the human body?

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Answer: Stapes

18.

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

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Answer: Nitrogen

19.

What is the powerhouse of the cell?

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Answer: Mitochondria

20.

What is the freezing point of water in Celsius?

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Answer: 0 degrees

Medium Science Questions

1.

What is the chemical formula for table salt?

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Answer: NaCl

2.

What is the smallest planet in our solar system?

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Answer: Mercury

3.

What is the study of weather called?

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Answer: Meteorology

4.

What is the chemical symbol for iron?

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Answer: Fe

5.

What is the process by which plants make food?

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Answer: Photosynthesis

6.

What is the unit of electrical resistance?

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Answer: Ohm

7.

What is the pH of pure water?

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Answer: 7

8.

What is the largest bone in the human body?

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Answer: Femur

9.

What is the study of fungi called?

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Answer: Mycology

10.

What is the chemical symbol for silver?

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Answer: Ag

11.

What is the speed of sound at sea level?

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Answer: 343 m/s

12.

What is the most abundant element in the universe?

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Answer: Hydrogen

13.

What is the study of insects called?

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Answer: Entomology

14.

What is the chemical symbol for potassium?

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Answer: K

15.

What is the basic unit of heredity?

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Answer: Gene

16.

What is the SI unit of force?

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Answer: Newton

17.

What is the study of the universe called?

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Answer: Cosmology

18.

What is the chemical symbol for copper?

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Answer: Cu

19.

What is the smallest particle of an element?

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Answer: Atom

20.

What is the study of earthquakes called?

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Answer: Seismology

Hard Science Questions

1.

What is the chemical symbol for mercury?

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Answer: Hg

2.

What is the study of birds called?

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Answer: Ornithology

3.

What is Avogadro's number?

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Answer: 6.022 × 10²³

4.

What is the chemical symbol for tungsten?

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Answer: W

5.

What is the study of fish called?

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Answer: Ichthyology

6.

What is the Planck constant used for?

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Answer: Quantum mechanics

7.

What is the chemical symbol for lead?

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Answer: Pb

8.

What is the study of algae called?

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Answer: Phycology

9.

What is the Heisenberg Uncertainty Principle about?

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Answer: Position and momentum

10.

What is the chemical symbol for antimony?

hard
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Answer: Sb

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