Science question of the day — Friday, 16 October 2026
Which noble gas glows red-orange in classic advertising signs?
- Argon
- Neon
- Krypton
- Xenon
Reveal the answer
Neon. Neon gives off a red-orange glow when electricity passes through it; other colours usually come from other gases or coated tubes.
Neon's name comes from the Greek 'neos', meaning 'new'.
About this science quiz
How much of school science stuck? This free science trivia quiz covers the four big branches — chemistry, biology, physics and space — from the formula for water to what the Sun will become when it dies. Pick easy, medium or hard and work through quick multiple-choice rounds on elements, the human body, forces and units, and the planets and moons of our solar system. Every answer comes with a short explanation and a fun fact, so a wrong guess still teaches you something. No login, no download: a round takes a couple of minutes, perfect for a coffee break or a pub quiz warm-up.
What the science questions cover
Chemistry
Elements, the periodic table, pH, noble gases and the chemistry of everyday things like water.
Biology & the human body
Cells, DNA, chromosomes, blood types, photosynthesis and the organs that keep us running.
Physics & space
Forces, energy, light and SI units, plus the planets, moons and stars of our cosmic neighbourhood.
Science questions and answers by topic
Choose your difficulty
easy science quiz
10 questions. A friendly warm-up for casual players.
medium science quiz
10 questions. For regular quiz players who know the basics.
hard science quiz
10 questions. The toughest questions we have, for experts.