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