- 1. What type of geological feature is the Giant’s Causeway?
A) Basalt columns
B) Lava flow
C) Granite cliffs
D) Sandstone arches
- 2. What is the name of the hole located in Siberia that was formed by a gas explosion?
A) Kola Superdeep Borehole
B) Batagaika Crater
C) Lake Baikal
D) Vredefort Crater
- 3. Which hole is known for being the deepest hole dug by humans?
A) Challenger Deep
B) Mariana Trench
C) Crater Lake
D) Kola Superdeep Borehole
- 4. What is the name of the large, circular hole in the ocean near the coast of Belize?
A) Andaman Sea
B) Sargasso Sea
C) Lake Titicaca
D) Great Blue Hole
- 5. What is the largest sinkhole in the world, located in China?
A) Maya Sinkhole
B) Zhengjiajie
C) Puerto Rico Sinkhole
D) Xiaozhai Tiankeng
- 6. Where can you find the 'Tunnel of Love', a railway tunnel?
A) Ukraine
B) France
C) Italy
D) Germany
- 7. What strange feature is found in the mineral-rich pools of Pamukkale, Turkey?
A) Crystal caves
B) Volcanic pits
C) Sand dunes
D) Travertine terraces
- 8. What is the observation hole in the Yucatán Peninsula known for?
A) Cenotes
B) Glacial Lakes
C) Coral Reefs
D) Desert Valleys
- 9. Which state in the U.S. features the 'Devil's Kettle', where one side of a waterfall has no visible outlet?
A) Minnesota
B) Arizona
C) Oregon
D) Colorado
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