The _______ era encompasses 90 percent of Earth's history. Some of the oldest rocks ever discovered on Earth were found in western Greenland and were dated at approximately _______ billion years using isotopic dating methods. The breakup of the most recent supercontinent of _______ is responsible for the current arrangement of continents. During the Precambrian time, the oceans and atmosphere formed around Earth, and the concentration of oxygen gas eventually reached the point where it could support aerobic _______. As the Earth cooled, layers formed as gravity pulled the dense material into the interior of the planet, creating a/an _______ of dense nickel and iron. Respond to the following based on your reading. Discuss the geologic processes that formed the continents during the Precambrian era.
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The PRECAMBRIAN era encompasses 90 percent of Earth's history. Some of the oldest rocks ever discovered on Earth were found in western Greenland and were dated at approximately BETWEEN 3.7 AND 3.8 billion years using isotopic dating methods. The breakup of the most recent supercontinent of PANGEA is responsible for the current arrangement of continents. During the Precambrian time, the oceans and atmosphere formed around Earth, and the concentration of oxygen gas eventually reached the point where it could support aerobic RESPIRATION. As the Earth cooled, layers formed as gravity pulled the dense material into the interior of the planet, creating a/an LAYER/VOLCANO of dense nickel and iron. Respond to the following based on your reading. Discuss the geologic processes that formed the continents during the Precambrian era.
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Answer:
The Precambrian era encompasses 90 percent of Earth's history. Some of the oldest rocks ever discovered on Earth were found in western Greenland and were dated at approximately 3.8 billion years using isotopic dating methods. The breakup of the most recent supercontinent of Pangea is responsible for the current arrangement of continents. During the Precambrian time, the oceans and atmosphere formed around Earth, and the concentration of oxygen gas eventually reached the point where it could support aerobic life. As the Earth cooled, layers formed as gravity pulled the dense material into the interior of the planet, creating a/an core of dense nickel and iron.
The geologic processes that formed the continents during the Precambrian era: Earth’s crust began cooling from the multiple meteor and comet collisions. Oceanic plates are denser than continental plates, but they are also much thinner. This means rift zones are more likely to form in oceanic plates than continental plates.