The question asks for the correct chronological order of the three major eras within the Phanerozoic Eon. This requires knowledge of the geological timescale, specifically the sequence of these eras from oldest to most recent.
Correct Option: C) Paleozoic \(\rightarrow\) Mesozoic \(\rightarrow\) Cenozoic is the correct chronological order of the three eras of the Phanerozoic Eon, from oldest to most recent.
The question asks about the origin of the name for the Hadean Eon, a geological time period. This requires knowledge of both geology and Greek mythology.
Correct Option: C) Hades (the underworld) — The Hadean Eon is named after Hades, the Greek god of the underworld, due to the extremely hot, volcanic, and inhospitable conditions on Earth during this early period, which resembled a 'hellish' environment.
The question asks to identify the eon during which the 'Great Oxygenation Event' (GOE) occurred. This event was a critical period in Earth's history when oxygen began to accumulate in the atmosphere, fundamentally changing its composition and paving the way for more complex life forms. We need to recall the geological timescale and the major events associated with each eon.
Correct Option: A) Proterozoic - The Great Oxygenation Event, a pivotal period where oxygen levels in Earth's atmosphere dramatically increased due to photosynthetic activity, occurred during the early to mid-Proterozoic Eon, approximately 2.4 to 2.0 billion years ago.
The question asks to identify the oldest known fossils on Earth. This requires knowledge of early life forms and their appearance in the geological record.
C) Bacteria (stromatolites) — Stromatolites, formed by ancient cyanobacteria, are considered the oldest known fossils, with evidence dating back approximately 3.5 billion years. They provide crucial insights into early life and the oxygenation of Earth's atmosphere.
The question asks to identify the supercontinent that existed during the late Proterozoic Eon, specifically between approximately 1000 and 750 million years ago. This requires knowledge of Earth's geological history and the timeline of supercontinent formation and breakup.
Correct Option: D) Rodinia
The question asks about the approximate time span of the Paleozoic Era. To answer this, one needs to recall the geological time scale, specifically the major eras and their start and end dates in millions of years ago (Ma).
D) 541 to 252 million years ago. This range accurately represents the beginning and end of the Paleozoic Era as established by the International Commission on Stratigraphy (ICS).