How old was the earth when the layers formed?

Answer 1

The Earth is 4.54 billion years old...

The earth's layers were actually formed from the very beginning of life on the planet.

Around 4.5 billion years ago, as the planetesimals, the building blocks of Earth, collided and collapsed under the force of their own gravity, forming the major layers of the Earth's crust, outer core, inner core, and mantel. At that time, the lighter elements rose to form the crust and the mantel, while the heavier elements sank to the Earth's core.

resulting in the creation of our planet Earth.

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Answer 2

Ian Aitchison

The Earth's layers formed over approximately 4.6 billion years.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.