how does world come to existence
Answers
Explanation:
The earth formed 4.54 billion years ago,approximately one-third the age of the universe by acceleration from the solar nebula .Volcano outgassing primordial atmosphere and then the ocean,but the early atmosphere contained no atmosphere
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Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. Volcanic outgassing probably created the primordial atmosphere and then the ocean, but the early atmosphere contained almost no oxygen.
Formation. When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.
The earliest time that life forms first appeared on Earth is at least 3.77 billion years ago, possibly as early as 4.28 billion years, or even 4.5 billion years; not long after the oceans formed 4.41 billion years ago, and after the formation of the Earth 4.54 billion years ago.
Earth and all the planets of our solar system formed, 4.6 billion years ago, from the accretion of gas and dust that was orbiting the newly forming Sun. For the first 10-20 million years after the main period of planet formation, most of the remaining debris in the solar system was swept up by the newly formed planets.
The first land plants appeared around 470 million years ago, during the Ordovician period, when life was diversifying rapidly. They were non-vascular plants, like mosses and liverworts, that didn't have deep.
The oldest confirmed insect fossil is that of a wingless, silverfish-like creature that lived about 385 million years ago. It's not until about 60 million years later, during a period of the Earth's history known as the Pennsylvanian, that insect fossils become abundant.
Modern geochemical evidence suggests that water was delivered to Earth by impacts from icy planetesimals similar in composition to modern asteroids in the outer edges of the asteroid belt.
The Longest-lived Insect: The queen of termites, known to live for 50 years. Some scientists believe that they live for 100 years. The Oldest Fossil Butterfly or Moth: A Lepidoptera fossil found in England is estimated to be 190 million years old.
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