- 1. Which region of Mexico is known for its extensive underground river systems?
A) Baja California
B) Chiapas
C) Mexico City
D) Yucatán Peninsula
- 2. What is the name of the largest underground river in the Yucatán Peninsula?
A) Cenote Ik Kil
B) Cenote Dos Ojos
C) Sac Actun
D) Rio Secreto
- 3. What natural feature often indicates the presence of an underground river?
A) Deserts
B) Mountains
C) Cenotes
D) Lakes
- 4. Which ancient civilization used cenotes for rituals and sacrifices?
A) Aztec
B) Olmec
C) Zapotec
D) Maya
- 5. Which underground river is known for its stunning stalactites and stalagmites?
A) Cenote Xkeken
B) Cenote Sagrado
C) Cenote Samula
D) Rio Secreto
- 6. What is the term used for the entrance to an underground river?
A) Riverbank
B) Spring
C) Cenote
D) Estuary
- 7. In which state is the Grutas de Tolantongo located, famous for its thermal waters?
A) Veracruz
B) Hidalgo
C) Oaxaca
D) Guerrero
- 8. What substance primarily contributes to the acidity of rainwater affecting limestone?
A) Carbon dioxide
B) Sulfur dioxide
C) Ozone
D) Methane
- 9. Which popular tourist location features underground rivers and cenotes in the Riviera Maya?
A) Xcaret
B) Coba
C) Chichen Itza
D) Tulum
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