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Cave knowledge quiz

Answer questions about caves
Quiz by
Nebdeb
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Last updated: February 4, 2026
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First submittedFebruary 4, 2026
Times taken6
Average score11.9%
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Hint
Answer
Formation that hangs from the ceiling
Stalactite
Formation that grows from the ground
Stalagmite
Rock type most large caves form in
Limestone
Process where water dissolves rock
Erosion
Animals that live only in caves
Troglobite
Underground room inside a cave
Chamber
Weak acid in rainwater that forms caves
Carbonic acid
Structure formed when stalactite and stalagmite join
Column
General term for cave formations
Speleothems
Landscape of sinkholes and caves
Karst
Caves formed by lava flows
Lava tube
Mineral in stalactites/stalagmites
Calcite
Vertical cave shaft
Pit
Thin hollow stalactite type
Straw
Sideways-growing cave formation
Helictite
Ice cave formed in glaciers
Moulin
Cave without sunlight
Aphotic
Longest cave system in the world
Mammoth caves
Mineral formula of calcite
CaCO3
Type of weathering that forms limestone caves
Chemical
Ion released when carbonic acid dissolves limestone
Calcium
Hint
Answer
Process where calcite comes out of solution
Precipitation
Loss of CO2 from dripping water is called
Degassing
Speleothem growth depends strongly on this factor
Drip rate
Underground drainage network in a karst
Conduit
Cave passage formed under pressure below water table
Phreatic tube
Cave passage formed above water table
Vasose passage
Rock layer that allows water flow
Aquifer
Rock layer that blocks water
Aquiclude
Cave formed by sulfuric acid is called
Hypogenic
Organisms that feed on minerals instead of sunlight
Chemoautotrophs
Cave zone with some light
Twilight zone
Loss of pigmentation in cave animals is called
Albinism
Air movement driven by temperature differences
Convection
Water pressure that enlarges phreatic caves
Hydrostatic
Crystal growth form of calcite
Rhombohedral
Annual growth layer in speleothems
Laminae
Mineral replacing calcite in some caves
Gypsum
Mineral replacing calcite in some caves
Dolomite
Mineral replacing calcite in some caves
Silica
Mineral replacing calcite in some caves
Aragonite
Mineral replacing calcite in some caves
Magnesite
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