Question

why is the Earth called living planet

Answer 1

Probably the most significant part of theEarths consideration as a living planet is that so far throughoutthe many extinction events in the Earths History the life forms have always managed to come back. Before the Permian-Triassic extinction event of 252 million years ago,the Gymnosperms were the dominant plant form on the Earth. The Angiosperms had not even come into existence yet. The Gymnosperms were able to survive the Permian-Triassic extinction event and still reign as the dominant plant groupbut 245 million years ago, a new plant group, the Angiosperms, came into existence. For another 145 million years the Angiosperms played second fiddle to the still dominant Gymnosperms but 100 million years ago the Angiosperms became the dominantplant group. It seems as though the Earth can struggle and eventually rebound from an extinction event and ultimately new forms will appear and creatively establish themselves as partners with an ever evolving Earth. We do not know if any past ages could be deemed superior to our present long term age but we have plenty of past ages tochoose from. Beginning with the Permian-Jurassic extinction of 252 million years ago the Earth has gone through various and colorful ages filled with dynamic and interesting plants andanimals that the mostvisionary scientists could not think up if they solely had to usetheir imaginations fora sci-fi flic. What has been the reality of theplanet Earth far surpasses any of our fantastical imaginations. The Earth has had constant geological change and biologicalevolution. The Mesozoic Era from 251 to 66 mya is divided into the Triassic, Jurassic, and Cretaceous periods each which saw new, recently created animal and plant groups. The Cenozoic era from 66mya to the present is divided into the Paleogene( which is split into the Paleocene, Eocene, and Oligocene), the Neocene (which is split into the Miocene,and the Pliocene), and the Quatenary ( which is split into the Pleistocene, and the present era- the Holocene). Mammals,Birds, Crocodilians, Turtles, Amphibians, and Lepidosaurs survived the 66 mya Cretaceous-Paleogene extinction event which extincted75% of plant and animal forms and diversified and multiplied into present day forms caused by a combination of the Asteroid Impact, Volcanic Eruptions, Climate Change. and Sea Level Change. The 252 mya Permian-Triassic event extincted 95% of Earth life caused by a combination of Siberian Volcanism, Asteroid impact, Methane Gas Hydrates, and Sea Level Changes. New Animal and Plant Classes were created that did not exist before. The 201.3 mya Triassic-Jurassicevent extincted 50% of living Earth plant and animal classes caused by Volcanic eruptions, climate change, and asteroid impact after which the Dinosaurs became dominant when the Synapsisds and the Archosaurs went extinct.

Answer 2

The earth is called a living planet because it has the conditions to sustain life on it like:-
1) It has oxygen , carbondioxide, helium.
2) Water is present on earth in a liquid form , which helps to establish the existence of all types of living things.
3)Accurate distance from sun provides sunlight in a moderate amount. if too close the earths atmosphere will burn up and therefore life would not be possible. If too far sunlight would not be reachable and the climate would be too cold for the life to sustain.

These are some examples but practically there are many ways to prove that earth is called a living planet