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BIOGRAPHY OF THE EARTH, FORMATION OF THE CONTINENTS - Coggle Diagram
BIOGRAPHY OF THE EARTH, FORMATION OF THE CONTINENTS
To understand when and what happened in this long history of the earth, scientists
have divided time into chronological units. The largest is the eon, which is divided
into geological eras, these in periods and these in epochs.
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Phanerozoic, on the other hand, covers 560 million years, has three eras and
reaches the current time, the Holocene.
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known as the age of the dinosaurs, saw with its hot
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million years, until today. In this period, there is the
collision of Asia with India and Arabia with Eurasia,
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complex forms of life appear mammals, hominids,
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THE BIG BANG
How did the Earth, the Sun and the planets appear?
According to most scientists, billions of years ago, the whole universe was a huge
dense and hot mass, and about 13,800 million years ago, that mass exploded. It is
known as the BIG BANG, a huge explosion that is in continuous expansion.
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were thrown in all directions, at a speed close to the light. Over time, maybe 6000 or
7 billion years later, they reduced their speed. Over time, some masses stayed closer
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interested in, what we call today MILKY WAY. We are interested because we are
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An incandescent sphere is our Sun, a star like millions of stars that were
forming. The small masses that orbit around were also condensed, ones more than
others, forming the planets and satellites.
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Today, the Earth has a different aspect as when it
was formed around 4,470 millions of years ago. At
the beginning, it was like a pile of rocks whose
interior had a lot of fire, so much that the heat
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Little by little, the heat descended and
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took to dry the crust, which became solid. At the
beginning, it did not have atmosphere or water,
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meteorites. In addition, the fire inside continued to
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numerous cracks. That lava, when it cooled and
consolidated, formed layers that gradually
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Everything was in constant changing, the fire from the center of the Earth
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gigantic earthquakes. All this violent interaction of fire, earth, air and water served to
build the layers of soil, which became rich, while the surface was transformed with
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CONTINENTS FORMATION
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In 1912, the German scientist Alfred Wegener formulated the hypothesis that
all the continents were once together. He called it Pangea and then, they were
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the observations already made, where it shows that the profiles of the continents
fitted (for example, South America with Africa), but he added other arguments: the
geologic formations and the distribution of the fossils. However, he could not explain
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been fragmented into several pieces, called
tectonic plates, which have been displaced
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(including continents and oceans), which
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each other or move laterally. The continents,
then, were not always where they are, and even
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b. Asthenosphere: the upper layer of the earth's mantle, below the
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