Ash was the solid, somewhat powdery substance that was left over after any fuel would undergo combustion.
In 2269, when told to commence his sensor sweep by James T. Kirk and before being cut off by a loud noise, Arex said, "Sensors show crystalline surface heavily fractured by lava flows. Ash and smoke suspended in oxygen-nitrogen atmosphere." (TAS: "The Terratin Incident")
| Fire |
|---|
| Fires: Ash • Campfire • Combustion (Spontaneous combustion) • Smoke • Spark • Wildfire (Brush fire) |
| Firefighting: Fire extinguisher • Fire department (Fire House Nº 5, Toronto Fire) • Firefighter • Fire engine • Fire hose • Fire hydrant • Fireman's carry • Fireman's pole |
| Detection and evasion: Fire alarm • Fire alert • Fire escape • Fireplace • Fire suppression system • |
| Fire-starting: Candle • Flammable substance • Fire hazard • Firewood (Kindling) • Lighter • Match |
| Food and drink: Flambé (Antimatter Flambé • Flambé noodles) • Flaming cocktail |
| Other: Arson • Burn • Fireworks display |