Please enable JavaScript.
Coggle requires JavaScript to display documents.
Biography of the Earth, formation of continents - Coggle Diagram
Biography of the Earth, formation of continents
THE BIG BANG
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.
The extraordinarily dense matter is transformed into a thousand million pieces that 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 and they were forming what we now know as galaxies. A galaxy in particular we are interested in, what we call today MILKY WAY. We are interested because we are part of it.
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.
Among these masses, there was one that remained of the right size and just enough distance to have water in a liquid state and retain a volt of gases.
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 melted the whole planet.
Millions of years took to dry the crust, which became solid. At the beginning, it did not have atmosphere or water, and it was still receiving many impacts of meteorites. In addition, the fire inside continued to flow in the form of incandescent lava through numerous cracks.
Everything was in constant changing, the fire from the center of the Earth continued coming out of the volcanoes and pieces of the crust moved causing gigantic earthquakes.
-
-
CONTINENTS FORMATION
In 1912, the German scientist Alfred Wegener formulated the hypothesis that
all the continents were once together.
The scientist based on 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 why they had separated.
For millions of years the Earth's crust has been fragmented into several pieces, called tectonic plates, which have been displaced because they belong to the lithosphere (including continents and oceans), which "floats" on a fluid cover (called the asthenosphere).
The continents, then, were not always where they are, and even today they move millimeters per year.
-
b. Asthenosphere: the upper layer of the earth's mantle, below the
-
-
-
GEOLOGICALERAS
The largest is the eon, which is divided into geological eras, these in periods and these in epochs.
Precambrian and the Phanerozoic. The first covers almost 4 billion years. The Phanerozoic, on the other hand, covers 560 million years, has three eras and reaches the current time, the Holocene.
The Paleozoic era ("ancient life"): It extended for 312 million years and it is when the Earth was divided into several continents.
The Mesozoic era ("intermediate life"): It is also known as the age of the dinosaurs, saw with its hot climate the diversification and multiplication of animal and plant life on earth.
The Cenozoic era ("new life"): It covers the last 65 million years, until today. In this period, there is the collision of Asia with India and Arabia with Eurasia, giving rise to the Alps and the Himalayas. More complex forms of life appear mammals, hominids, Homo sapiens and the current human being.
-
