Q 01/05

Eight rare cars of which American sports model fell into a sinkhole beneath a Bowling Green, Kentucky museum?

A) Mustang

B) Corvette

C) Camaro

D) Thunderbird

Answer · why

B) Corvette

The National Corvette Museum turned its disaster into an exhibit about the collapse. Five of the eight cars were hauled out within a month, some of th...

Q 02/05

Off the coast of which Central American country does the Great Blue Hole, a 318-metre-wide marine sinkhole, lie?

A) Honduras

B) Costa Rica

C) Panama

D) Belize

Answer · why

D) Belize

Belize protects the Great Blue Hole as part of its barrier reef reserve, a UNESCO World Heritage Site. The pit sits near the middle of Lighthouse Reef...

Q 03/05

Which rock, built largely from the remains of sea creatures, most often dissolves to form sinkholes and caves?

A) Shale

B) Sandstone

C) Limestone

D) Granite

Answer · why

C) Limestone

Limestone gives way slowly: water seeping through its cracks carves hidden voids until the surface loses its support. The land above often stays intac...

Q 04/05

Which country's capital saw a three-story building vanish into a 20-metre-wide hole after Tropical Storm Agatha?

A) Guatemala

B) El Salvador

C) Nicaragua

D) Honduras

Answer · why

A) Guatemala

Guatemala City stands on loose volcanic debris, so geologists say the 2010 hole was no true sinkhole: escaping water had washed out a cavity from belo...

Q 05/05

Which US state, where over 110 sinkholes opened around Dover during a 2010 freeze, is famous for frequent collapses?

A) Georgia

B) Tennessee

C) Florida

D) Virginia

Answer · why

C) Florida

Florida rests on a thick platform of soluble rock, and its collapses cluster in the centre of the state. On the fringes, where the rock is far younger...