Coal Trivia
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50 free Coal trivia questions with answers — science & nature quiz, new questions added Aug 2026.
Coal is compressed swamp: plants that died 300 million years ago, buried and cooked until only carbon was left. It powered the Industrial Revolution, still makes a third of the world's electricity and is the biggest single source of carbon dioxide. These coal trivia questions cover the geology, the ranks, the mines, the safety lamps and canaries, the disasters, the smog and the strikes. Every answer is sourced, with a short explanation so you learn something even when you miss.
30 of 50 questions with answers and explanations. Play the quiz
Q 01What kind of rock is coal?
Sedimentary
Coal is a sedimentary rock because it builds up in layers from swamp plant debris that waterlogged ground kept from rotting away.
Q 02What do decaying plants become first, before heat and pressure turn them into coal?
Peat
Peat's acidic, oxygen-poor water stops dead plants rotting, and in 1950 it had kept Tollund Man so lifelike that his finders called the police.
Q 03Geologists named the Carboniferous period after the coal-rich rocks of which country?
Britain
Britain's coal-rich rocks gave the Carboniferous its name, yet that coal began as tropical swamp forest, because Europe then lay in the humid tropics.
Q 04During the great coal-forming age, how did ice sheets near the South Pole help coal swamps spread?
Lowered sea levels
Lowered sea levels did it: the ice sheets locked up so much water that the seas fell, exposing broad shelves and deltas where the coal swamps took root.
Q 05Teenage chemist William Perkin stumbled on mauve dye in 1856 while trying to make which drug from coal tar?
Quinine
Quinine, the malaria drug, was Perkin's target; his accidental mauve launched the synthetic dye industry, and coal-tar dye firms later turned their chemistry to making medicines.
Q 06Which 1941 John Ford film about a Welsh mining family beat Citizen Kane to the Best Picture Oscar?
How Green Was My Valley
How Green Was My Valley was shot in California because the war ruled out Wales, so the studio built an 80-acre Welsh mining village near Malibu.
Q 07Why did many Eastern US cities around 1900 heat homes with the highest-rank coal?
It burned with less smoke
City homes chose hard coal because it burned with less smoke, so when its miners struck in 1902, President Theodore Roosevelt stepped in to head off a winter coal famine.
Q 08Which rank of coal is the most abundant on Earth?
Bituminous
Bituminous coal is often nicknamed 'soft coal', yet the name has little to do with hardness: the rock itself is typically hard.
Q 09Every US mine producing the highest-rank coal is in which state?
Pennsylvania
Pennsylvania's hard coal lay packed into a few hundred square miles of five counties, which let a few mine owners, coal railroads and bankers take control.
Q 10Why was the trademarked brand 'Blue Coal' actually blue?
It was sprayed with dye at the mine
Blue Coal was blue because it was sprayed with dye at the mine, and the brand sponsored radio’s The Shadow for years, including the season Orson Welles voiced the hero.
Q 11After the Great Fire of 1666, a tax on coal shipped into London helped pay to rebuild which landmark?
St Paul's Cathedral
St Paul's Cathedral was largely paid for by coal: London burned so much sea coal shipped from Newcastle that a duty on each load could fund Wren's cathedral and the City churches.
Q 12How is coke made from coal?
Heating it without air
Heating it without air turns coal into coke, and in 1709 Abraham Darby used coke to smelt iron, letting him build much larger furnaces than charcoal allowed.
Q 13Thomas Newcomen's steam engine, first recorded near Dudley Castle in 1712, was mainly used to do what?
Pump water out of mines
Q 21After Gerald Ford vetoed two earlier bills, which president signed the US law making coal strip mines reclaim mined land?
Jimmy Carter
Jimmy Carter signed the strip-mining law in August 1977, yet at the signing he said he would have preferred a stricter bill.
Q 22What is the rock and soil removed to expose a coal seam called?
Overburden
Overburden has to be cleared before any coal is dug, so surface mining pays only where seams lie near the surface, and deeper coal is mined underground.
Q 23Which underground coal-mining method takes out a whole panel of coal, letting the roof collapse behind it?
Longwall mining
Newcomen's engine was built to pump water out of mines, yet he could not patent it: Thomas Savery's broad 1698 patent for a steam pump already covered it.
Q 14Which film tells how London activists raised money for a striking Welsh mining village in 1984?
Pride
Pride (2014) follows the group Lesbians and Gays Support the Miners, and the favour was returned: in June 1985 Welsh miners led London's Lesbian and Gay Pride parade.
Q 15Which broom-riding old woman leaves coal for naughty children on the night before Epiphany?
Befana
The Befana leaves coal for naughty children, and legend says she still roams because she was too busy with housework to travel with the Three Wise Men.
Q 16Which London coal-fired power station appears on the cover of Pink Floyd's 1977 album Animals?
Battersea Power Station
While Battersea Power Station was photographed for the cover, the band's giant inflatable pig broke free, drifted past planes approaching Heathrow and came down in Kent.
Q 17As of 2023, which country mined more than half the world's coal?
China
China mined more than half the world's coal in 2023, yet it still bought more foreign coal than any other country, nearly twice India's imports.
Q 18As of 2023, which two countries exported the most coal?
Indonesia and Australia
Indonesia and Australia exported the most coal in 2023, while third-placed Russia turned its sales toward Asia after Western bans and sanctions.
Q 19Which Swedish scientist calculated in 1896 how much extra carbon dioxide in the air would warm the Earth?
Svante Arrhenius
Svante Arrhenius was really trying to explain the ice ages, and he hoped the warming from burning coal would bring better climates and bigger harvests.
Q 20Which 2021 agreement committed countries to 'phasing down' coal?
The Glasgow Climate Pact
The Glasgow Climate Pact's drafts said 'phase out' coal until India and China led late opposition, and summit president Alok Sharma said he was deeply sorry.
Longwall mining lets the roof fall once the coal is out, so the ground above can sink and crack, which in 2009 raised fears for Sydney's drinking-water catchment.
Q 24Which novelist, the son of a Nottinghamshire coal miner, drew on that childhood in Sons and Lovers?
D. H. Lawrence
D. H. Lawrence's father was a barely literate miner who had worked from age 10, but his educated mother was determined her children would not do manual labour.
Q 25Where does most of the excess rock blasted off in mountaintop removal mining end up?
Into nearby valleys
The excess rock is dumped into nearby valleys as 'valley fills', which have buried more than 1,000 miles of Appalachian streams.
Q 26Which region is the largest coal-producing area in the United States?
Powder River Basin
The Powder River Basin holds some of the world's largest low-sulfur coal deposits, which power plants prized once they had to cut sulfur dioxide pollution.
Q 27What is the explosive mine gas known as firedamp?
Methane
Methane blasts can ignite coal dust, so US rules require rock dust spread in all underground areas of coal mines to stop a coal-dust explosion from spreading.
Q 28Who invented the gauze-screened miners' safety lamp in 1815?
Humphry Davy
Humphry Davy's gauze soaked up the flame's heat, so air and gas could pass through to the flame but the flame could not escape to ignite the gas outside.
Q 29Which future railway pioneer built a competing safety lamp in 1815?
George Stephenson
George Stephenson was accused of stealing the idea, but a local committee cleared him with a £1,000 award, and in 1833 a Commons committee gave him equal claim.
Q 30Which group did Britain's 1842 Mines Act ban from working underground in coal mines?
Women and girls
The 1842 Mines Act banned women and girls, and boys under 10, from working underground after a Royal Commission report on children in mines shocked the public.