1. What black treasure hides deep underground waiting to burn bright?
Answer: Coal

2. What starts as plant life but becomes energy after millions of years?
Answer: Fossil fuel

3. What dark rock can warm a home on a cold night?
Answer: Anthracite

4. What do miners follow to reach a black vein?
Answer: Coal seam

5. What leaves dust on your hands but warmth in your house?
Answer: Coal briquette

6. What power source crackles in old-fashioned stoves?
Answer: Lump coal

7. What solid fuel is loaded into a steam train’s furnace?
Answer: Boiler coal

8. What forms under pressure, heat, and millions of years?
Answer: Carbon rock

9. What black mineral was once Santa’s warning gift?
Answer: Christmas coal

10. What dark block can turn water into steam for engines?
Answer: Fuel block

11. What substance glows red without melting fully?
Answer: Ember coal

12. What do miners dig for with helmets and lanterns?
Answer: Bituminous coal

13. What rock smudges fingers but powers factories?
Answer: Soft coal

14. What material fills buckets in old fireplaces?
Answer: Hearth coal

15. What energy source turns turbines in old power plants?
Answer: Thermal coal

16. What can be crushed into powder and burned efficiently?
Answer: Pulverized coal

17. What black resource is stored in towering piles near rail tracks?
Answer: Coal stockpile

18. What is washed clean before burning to reduce impurities?
Answer: Clean coal

19. What dark material is loaded by shovels into furnaces?
Answer: Coal fuel

20. What carbon-rich rock shines faintly when held to the light?
Answer: Jet coal

21. What burns hotter than wood and lasts longer?
Answer: Smokeless coal

22. What do miners ride in to reach deep tunnels?
Answer: Coal cart

23. What black mineral can polish into jewelry?
Answer: Jet stone

24. What substance can be turned into coke for steelmaking?
Answer: Metallurgical coal

25. What rock was once swamp plants but now powers metalworks?
Answer: Coke coal

26. What fuel makes chimneys puff thick grey clouds?
Answer: Furnace coal

27. What brittle rock cracks loudly when thrown into fire?
Answer: Hard coal

28. What resource is cut with machines deep underground?
Answer: Coal face

29. What mineral is measured in tons when fueling industries?
Answer: Energy coal

30. What black treasure travels by long trains across countries?
Answer: Coal load

31. What dark mineral heats kilns for pottery?
Answer: Kiln coal

32. What burns steadily and keeps iron glowing?
Answer: Forge coal

33. What crumbly rock releases heat but not flame?
Answer: Peat

34. What is weighed in sacks for old kitchen stoves?
Answer: Stove coal

35. What dark fuel is stacked beside old cottages?
Answer: Coal pile

36. What rock melts snow on metal rooftops when burning below?
Answer: Heating coal

37. What brittle chunk crackles in blacksmith shops?
Answer: Smithing coal

38. What fuel turns water into pressurized power?
Answer: Steam coal

39. What mineral leaves soot behind when burned?
Answer: Carbon coal

40. What do miners search for in deep shafts?
Answer: Coal deposit

41. What dirt-covered resource is shoveled by the ton?
Answer: Coal mass

42. What black stone brightens when fire touches it?
Answer: Burning coal

43. What energy source releases heat faster than logs?
Answer: Quick-burn coal

44. What ancient fuel can power giant machines?
Answer: Industrial coal

45. What dark block carried sailors through cold oceans?
Answer: Ship coal

46. What rock can crumble easily but burn slowly?
Answer: Sub-bituminous coal

47. What blasts furnaces hot enough to melt iron?
Answer: Blast-furnace coal

48. What mineral is transported in endless conveyor belts?
Answer: Raw coal

49. What fuel is poured into old iron stoves?
Answer: Domestic coal

50. What blackened resource powered the Industrial Revolution?
Answer: Steam-engine coal

51. What powdery residue forms after coal burns?
Answer: Ash

52. What rock is used to heat old bathhouses?
Answer: Bath coal

53. What energy source turns huge gears in factories?
Answer: Foundry coal

54. What material is stored in tall metal silos near plants?
Answer: Coal reserve

55. What fuel glows orange without turning to liquid?
Answer: Ember fuel

56. What dark block is broken with pickaxes underground?
Answer: Coal chunk

57. What rock sits in ovens before steel is made?
Answer: Coking coal

58. What rock-powered engine pulled old freight trains?
Answer: Firebox coal

59. What resource was once shoveled by stokers on ships?
Answer: Boiler-room coal

60. What energy source releases smoke that paints chimneys black?
Answer: Sooty coal

61. What black mineral can be carved into buttons and beads?
Answer: Jet gem

62. What dark substance heats metal until it glows white?
Answer: Forge fuel

63. What rock is sorted by size before burning?
Answer: Graded coal

64. What energy source is found in both deep mines and surface pits?
Answer: Strip coal

65. What mineral sits in wagons waiting to burn?
Answer: Carload coal

66. What material can heat an entire workshop?
Answer: Workshop coal

67. What rock is shoveled by miners wearing dust masks?
Answer: Coal ore

68. What resource becomes light and warm once ignited?
Answer: Fire coal

69. What rock can ignite with a spark yet stays solid?
Answer: Ignition coal

70. What ancient fuel created clouds of steam in old mills?
Answer: Mill coal

71. What black mineral fills sacks in winter markets?
Answer: Market coal

72. What fuel do old locomotives swallow greedily?
Answer: Locomotive coal

73. What rock is broken into nuggets before selling?
Answer: Coal nugget

74. What mineral sits in bunkers under factories?
Answer: Bunker coal

75. What resource once powered giant paddle steamers?
Answer: Paddle-coal

76. What dark rock turns engines into roaring machines?
Answer: Engine coal

77. What solid fuel leaves chimneys puffing grey trails?
Answer: Chimney coal

78. What brittle stone burns hotter than many woods?
Answer: Heat coal

79. What block warms entire warehouses during winter?
Answer: Warehouse coal

80. What black mineral is scraped from walls in mines?
Answer: Coal layer

81. What resource is dumped through chutes into basements?
Answer: Basement coal

82. What rock fills iron buckets in old homes?
Answer: Bucket coal

83. What once kept steamships crossing oceans nonstop?
Answer: Marine coal

84. What stone burns bright inside metal ovens?
Answer: Oven coal

85. What material forms fine black dust in train cars?
Answer: Coal dust

86. What dark rock helps melt metals in factories?
Answer: Furnace fuel

87. What resource rested beside old cast-iron heaters?
Answer: Heater coal

88. What fuel cooked meals in ancient iron ranges?
Answer: Range coal

89. What rock is lifted by cranes into processing plants?
Answer: Coal cargo

90. What black mineral is piled high at port docks?
Answer: Dock coal

91. What fuel glows brightest when air blows through it?
Answer: Blazing coal

92. What material burns in kilns making bricks strong?
Answer: Brick-kiln coal

93. What rock keeps huge furnaces roaring nonstop?
Answer: Furnace-grade coal

94. What resource rides conveyor belts into crushers?
Answer: Feed coal

95. What dark treasure is shoveled into giant boilers?
Answer: Boiler fuel

96. What material powered old factories day and night?
Answer: Factory coal

97. What rock is crushed into fine black powder?
Answer: Coal fines

98. What resource burns slowly through long winter nights?
Answer: Night coal

99. What black block leaves glowing trails of heat?
Answer: Ember rock

100. What dark mineral powered a whole era of machines and industry?
Answer: Coal energy