Question

(3) How much time was taken by the Earth to
reach its present form after being detached from the
Sun ? Why?​

Answer 1

Answer:

Answer: Most of the planets in our solar system including earth were formed by detaching form sun nearly 4.5 billion years ago.

Explanation:

The Earth is thought to have been formed about 4.6 billion years ago by collisions in the giant disc-shaped cloud of material that also formed the Sun. Gravity slowly gathered this gas and dust together into clumps that became asteroids and small early planets called planetesimals.

Early Earth was a very different place to the planet we inhabit today. Initially the planet didn't have a crust, mantle and core, and instead all the elements were evenly mixed. There were no oceans nor continents and no atmosphere. Meteorite collisions, radioactive decay and planetary compression made Earth become hotter and hotter. After a few hundred million years the temperature of Earth reached 2,000C - the melting point of iron - and Earth's core was formed.

At this point much of the Earth was molten and there may have been a magma ocean at the surface. Gradually the Earth cooled and the planet settled out into a core, mantle and crust. This layering of the planet helped to trigger plate tectonics at the surface, and the Earth began to look a little more like the planet we know today

Answer 2

Answer:

most of the planets in our solar system including earth were formed by detaching from sun nearly 4.5 billions year ago.

EXPLANATION:

when the solar system settled into its current layout about 4.5 billion years ago. Earth form where gravity pull swirling gas and dust in to become the third planet like it's fellow terrestrial planets, earth has a central core , a rocky mantle and a solid crust.

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