Eras and Geological Time CDS Questions

CDS Physical Geography

Eras and Geological Time MCQ Questions


7.
Which of the following is the correct chronological order of the three eras of the Phanerozoic Eon?
A.
Cenozoic → Mesozoic → Paleozoic
B.
Mesozoic → Paleozoic → Cenozoic
C.
Paleozoic → Mesozoic → Cenozoic
D.
Paleozoic → Cenozoic → Mesozoic
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ANSWER :
C. Paleozoic → Mesozoic → Cenozoic
8.
The Hadean Eon is named after which Greek mythological figure or concept?
A.
Helios (the sun)
B.
Hercules (the hero)
C.
Hades (the underworld)
D.
Hera (queen of gods)
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ANSWER :
C. Hades (the underworld)
9.
During which eon did the 'Great Oxygenation Event' occur, fundamentally changing Earth's atmosphere?
A.
Proterozoic
B.
Archean
C.
Hadean
D.
Phanerozoic
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ANSWER :
A. Proterozoic
10.
The oldest known fossils on Earth are of:
A.
Fish
B.
Amphibians
C.
Bacteria (stromatolites)
D.
Trilobites
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ANSWER :
C. Bacteria (stromatolites)
11.
Which supercontinent existed in the late Proterozoic Eon (approximately 1000–750 million years ago)?
A.
Gondwana
B.
Pangaea
C.
Laurasia
D.
Rodinia
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ANSWER :
D. Rodinia
12.
The Paleozoic Era spans approximately:
A.
2500 to 541 million years ago
B.
66 million years ago to present
C.
252 to 66 million years ago
D.
541 to 252 million years ago
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ANSWER :
D. 541 to 252 million years ago