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BIOGRAPHY OF THE EARTH, FORMATION OF
THE CONTINENTS - Coggle Diagram
BIOGRAPHY OF THE EARTH, FORMATION OF
THE CONTINENTS
THE BIG BANG
How did the Earth, the Sun and the planets appear?
- The mass was transformed into millions of pieces that were thrown in all directions.
- The pieces and/or mass stayed closer and formed galaxies. MILKY WAY
- Some masses/ pieces condensed and formed a huge incandescent star called Sun.
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
THE EARTH, PLANET
:
- 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.
- Little by little, the heat descended and allowed to form a stable crust.
- It did not have atmosphere or water, and it was still receiving many impacts of meteorites.
- The fire inside continued to flow in the form of incandescent lava.
- That lava, when it cooled and consolidated, formed layers
- Pieces of the crust moved causing gigantic earthquakes.
CONTINENTS FORMATION
The earth has not stopped evolving and continues to do so. One of the biggest changes he experienced was the formation of the continents. In 1912, the German scientist Alfred Wegener hypothesized that all the continents were once together. He called it Pangea and later, they separated through a process that he called continental drift. The scientist started from the observations already made, where he shows that the profiles of the continents fit (for example, South America with Africa), but added other arguments: geological formations and the distribution of fossils.
OROGENESIS
Creation of Mountain Ranges, through subduction. One tectonic plate sinks beneath the other (subduction)
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GEOLOGICAL ERAS
To understand when and what happened in this long history of the earth, scientists have divided time into chronological units. The vast geological history of the Earth is divided into two great eons: the Precambrian and the Phanerozoic. The first covers almost 4 billion years. The Phanerozoic, spans 560 million years, has three eras and reaches the present 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.