This page covers three Trivial topics that overlap a lot in practice: Science (free), and Space and Animals (both part of Trivial Plus). Science questions in the game lean toward things you could reason your way to, which makes them good for teaching: if you know why the answer is right, you will get the next variation too.
Each explanation below tries to give that reason, not just the fact.
Which metal has the highest melting point?
Tungsten
Tungsten melts at about 3,422 °C, which is why it was used for incandescent bulb filaments. Its chemical symbol, W, comes from its other name, wolfram.
Which base is found in RNA but not in DNA?
Uracil
RNA uses uracil where DNA uses thymine; both pair with adenine. Thymine is essentially uracil with an extra methyl group, which makes DNA easier to check for damage.
Through which of these does sound travel fastest?
Steel
Roughly 5,900 m/s in steel, 1,480 m/s in water and 343 m/s in air. Stiffer materials pass vibrations along faster. In a vacuum there is nothing to vibrate, so sound does not travel at all.
Roughly how long does sunlight take to reach Earth?
About 8 minutes (8 min 20 s on average)
Earth is about 150 million km from the Sun and light covers about 300,000 km per second, which works out to roughly 500 seconds. The figure varies a little through the year because the orbit is slightly elliptical.
Which metal is liquid at room temperature?
Type the answer
Mercury
Mercury melts at about −39 °C. Gallium and caesium are the near misses people reach for: gallium melts at about 30 °C (it will melt in your hand) and caesium at about 28 °C, both just above a normal room.
Which fundamental force holds an atom's nucleus together?
The strong nuclear force
Protons repel each other electrically, so something stronger has to bind them. The strong force is the strongest of the four but only works over about the width of a nucleus.
What is the densest planet in the solar system?
Earth
About 5.5 grams per cubic centimetre, thanks to a large iron core. Jupiter is far more massive but mostly hydrogen and helium, so its average density is only about a quarter of Earth's.
Which of these moons shoots geysers of water vapour and ice into space?
Enceladus
NASA's Cassini spacecraft saw plumes rising from cracks near Enceladus's south pole, nicknamed the tiger stripes, in 2005. They point to a liquid ocean under the ice. Europa may have plumes too, but Enceladus's are confirmed.
Which planet has a day that is longer than its year?
Venus
Venus takes about 243 Earth days to turn once on its axis but only about 225 to orbit the Sun. It also spins backwards compared with most planets.
What is the largest volcano known in the solar system?
Type the answer
Olympus Mons (on Mars)
It stands about 22 km high, around two and a half times the height of Everest above sea level, and is roughly as wide as the state of Arizona. Low gravity and no moving tectonic plates let it keep growing in one place.
What is the only mammal capable of true, powered flight?
The bat
The other three glide on flaps of skin and can only lose height. A bat's wing is a modified hand, with skin stretched between very long finger bones, and it flaps to climb.
What element gives lobster blood its blue tint?
Type the answer
Copper
Lobsters carry oxygen with hemocyanin, a copper-based protein that turns blue when oxygenated. Our hemoglobin uses iron instead, which is why our blood is red.
What is the largest living species of lizard?
The Komodo dragon
Large males reach about 3 metres. They live on a handful of Indonesian islands, including Komodo, and hunt prey as big as deer.
In science rounds, read the qualifier. "Of all metals" and "of all elements" are different questions, and so are "the largest organ" and "the largest internal organ" (skin and the liver respectively).
Space questions reward knowing a handful of numbers: about 8 minutes 20 seconds for sunlight to reach Earth, a 243-day Venusian rotation, a Jovian day under 10 hours. They come up again and again.
In a room, every correct answer is worth 500 points plus a speed bonus of up to 500 more, so knowing it fast matters as much as knowing it. The full rules are on How to Play.
Every question on this page was first served in a real Trivial game, then pulled from the game's question bank, checked against the answer and rewritten with an explanation. Questions whose answer is disputed were left out. If you think one is wrong, email support@flayrlabs.com and we will fix it. The library overview explains the process in more detail.
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