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Questions and Answers
What was one of the significant events during the Archean Eon?
What was one of the significant events during the Archean Eon?
- Moon formation
- Core accretion
- Formation of the first oceans (correct)
- Late bombardment stage
Which organism is associated with the Great Oxygenation Event in the Archean Eon?
Which organism is associated with the Great Oxygenation Event in the Archean Eon?
- Prokaryote bacteria (correct)
- Archaea
- Eukaryotes
- Bacteria
What is one of the major highlights of the Archean Eon?
What is one of the major highlights of the Archean Eon?
- Banded iron formations (correct)
- Tectonic activity
- First continent
- DNA
During which eon did life first form on earth?
During which eon did life first form on earth?
What was a key factor that enabled the Earth to support oceans and continents during the Archaean Eon?
What was a key factor that enabled the Earth to support oceans and continents during the Archaean Eon?
What marks the beginning of the Proterozoic Eon?
What marks the beginning of the Proterozoic Eon?
During which period did the first reptiles appear and lay the first shelled eggs?
During which period did the first reptiles appear and lay the first shelled eggs?
In which period did algae and sponges dominate the reefs?
In which period did algae and sponges dominate the reefs?
Which era is also known as the age of dinosaurs?
Which era is also known as the age of dinosaurs?
During which period did the first corals appear but were not widespread?
During which period did the first corals appear but were not widespread?
In which period did the climate change from warm and wet to much colder, leading to an ice age?
In which period did the climate change from warm and wet to much colder, leading to an ice age?
Which period is characterized by a uniform, tropical, wet climate with little seasonality?
Which period is characterized by a uniform, tropical, wet climate with little seasonality?
During which period did the first vascular plants with veins for transporting liquid appear?
During which period did the first vascular plants with veins for transporting liquid appear?
In which period did the first amphibian-like animals and proto-amphibians appear?
In which period did the first amphibian-like animals and proto-amphibians appear?
Which period saw the appearance of the first land plants similar to mosses and other plants without deep roots or leaves?
Which period saw the appearance of the first land plants similar to mosses and other plants without deep roots or leaves?
During which period did the first dinosaurs and marine reptiles appear?
During which period did the first dinosaurs and marine reptiles appear?
What process led to the production of most of the world’s iron ore deposits in the Archean Eon?
What process led to the production of most of the world’s iron ore deposits in the Archean Eon?
What was a key factor that enabled the Earth to support oceans and continents during the Archaean Eon?
What was a key factor that enabled the Earth to support oceans and continents during the Archaean Eon?
Which eon is characterized by the absence of fossil records due to the high temperature that was too high to sustain life?
Which eon is characterized by the absence of fossil records due to the high temperature that was too high to sustain life?
What geological feature formed next, causing oxygen to fill the oceans from cyanobacteria during the Archean Eon?
What geological feature formed next, causing oxygen to fill the oceans from cyanobacteria during the Archean Eon?
Which entity is associated with the Great Oxygenation Event during the Archean Eon?
Which entity is associated with the Great Oxygenation Event during the Archean Eon?
What era followed the Archean Eon and ranged from 2.5 billion years old to 541 million years old?
What era followed the Archean Eon and ranged from 2.5 billion years old to 541 million years old?
During which period did the first lobe-finned fish, amphibian-like animals, and proto-amphibians exist?
During which period did the first lobe-finned fish, amphibian-like animals, and proto-amphibians exist?
Which era is also known as the age of dinosaurs?
Which era is also known as the age of dinosaurs?
In which period did the first reptiles diversify and spread across the land?
In which period did the first reptiles diversify and spread across the land?
During which period did the climate change from warm and wet to much colder, leading to an ice age?
During which period did the climate change from warm and wet to much colder, leading to an ice age?
In which period did the first land plants appear, similar to mosses and other plants without deep roots or leaves?
In which period did the first land plants appear, similar to mosses and other plants without deep roots or leaves?
During which period did the first corals appear but were not widespread?
During which period did the first corals appear but were not widespread?
Which period is characterized by a uniform, tropical, wet climate with little seasonality?
Which period is characterized by a uniform, tropical, wet climate with little seasonality?
During which period did the first conifers appear?
During which period did the first conifers appear?
Which period saw the appearance of the first amphibian-like animals and proto-amphibians?
Which period saw the appearance of the first amphibian-like animals and proto-amphibians?
In which period did algae and sponges dominate reefs?
In which period did algae and sponges dominate reefs?
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Study Notes
Archean Eon
- Significant event: Great Oxygenation Event
- Organism associated with Great Oxygenation Event: Cyanobacteria
- Major highlight: Oxygenation of the atmosphere
- Key factor for supporting oceans and continents: Cooling of the planet
- Process that led to most of the world's iron ore deposits: Oxygenation of the atmosphere
Eon Sequence
- Life first formed on Earth during the Archean Eon
- The Archean Eon was followed by the Proterozoic Eon
- The Proterozoic Eon was followed by the Phanerozoic Eon
- The Phanerozoic Eon is also known as the age of dinosaurs
Proterozoic Eon
- Marks the beginning of the Proterozoic Eon: Oxygenation of the atmosphere
- Period when the first shelled eggs and reptiles appeared: Cambrian Period
- Period when algae and sponges dominated reefs: Cambrian Period
Phanerozoic Eon
- Period when the first corals appeared: Ordovician Period
- Period when the climate changed from warm and wet to much colder, leading to an ice age: Ordovician Period
- Period characterized by a uniform, tropical, wet climate with little seasonality: Silurian Period
- Period when the first vascular plants with veins appeared: Silurian Period
- Period when the first amphibian-like animals and proto-amphibians appeared: Devonian Period
- Period when the first land plants appeared: Devonian Period
- Period when the first dinosaurs and marine reptiles appeared: Triassic Period
- Period when the first conifers appeared: Carboniferous Period
- Period when the first reptiles diversified and spread across the land:Permian Period
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