How our earth came up as living planet? - First organism born - truesciencebehindscience

Today we live on this planet, occupying all its resources. But you ever imagined how earth became a living planet. Many scientists and astrologists gave theories about how it became a living planet. Today we will know one of the most suitable theories on this topic. So, let's go 4.5 billion years back with science behind science -

 

According to some theories, our sun's nebula was called Solar nebula. A small disturbance in the solar nebula started forming our sun. When our sun was being ready to burn till 9 billion years. Some rocky particles and dust started forming a planet, which is today called mother earth. When our earth was ready to be a planet, a big rocky substance came up in the gravitation of earth and revolved around it till now, today it is called moon by us.

 Our earth was continuously bombarded every day with several meteorites. Till now, many meteorites had hit earth containing a high volume of ice crystals, nitrogen compounds, and many essential minerals which later vaporized and start forming water vapor. These water vapor later condensed down to form our seas and oceans. Some of the water vapors started forming the atmosphere with other gases mentioned below.

About 3.9 million years ago, Our earth was formed completely and solidified but then also it was too hot to support life. Then, the magma inside the earth got excited and flushed out with very high pressure as lava and the volcanoes came into existence. With this many gases flushed out namely CO₂ and SO₂, etc., which started forming our earth's atmosphere. Till then, our atmosphere was filled up with harmful gases such as CO₂ and SO₂ which came from volcanoes. Now, these gases reacted with water vapor to form acids and hit the earth's surface forming a solid carbonate layer. So, most of the atmosphere's CO₂ of atmosphere settled on earth as solid carbonate.

About 3.5 billion years ago, The conditions for life started the existing temperature was dropping, we had an atmosphere, our earth had got enough nitrogen and minerals from meteorites that were sufficient for a single-celled organism. Down the sea, the temperature was very low for life to exist but near the ocean bed volcanoes, the temperature was enough for the bacterium to born. From the minerals first single-celled bacterium born and life came into existence. They obtained energy from carbon compounds present in the water like amino acids, sugars, etc. From here the bacteria divided simultaneously.

After some time, The ocean was completely filled up with the first bacteria making it a tougher competition to obtain food. Then some groups of bacteria evolved themselves and formed new species of bacteria called chemo-synthetic bacteria. They obtain their food by the Hydrogen sulfide (H₂S) present in water. Now, the amount of chemo-synthetic bacteria was increasing once more making competition tougher to obtain food.

About 3.4 million years ago, chemo-synthetic bacteria evolved to photosynthetic bacteria because the ocean was lacking H₂S. These photosynthetic bacteria now released oxygen gas. Since the number of photosynthetic bacteria was increasing the amount of oxygen produced was also increasing gradually. Till the next 1-2 billion years the oxygen level in our atmosphere was increasing gradually.

About 1.5 billion years ago, till the time no multicellular had born. The earth was completely covered with water surface except some land areas called islands. The tectonic plates came into action and small islands gathered to form a bigger supercontinent called RODINIA. I am sure that most of you didn't know about it for verification click on it. Who knew it comment below.

It's enough for today, we will continue another day. 

For the next part click the link given below.

ALSO READ THIS:- How our earth came up as a living planet? - Arrival of dinosaurs - truesciencebehindscience 

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HAIL MOTHERLAND