Did Earth form 4.6 billion years ago?

Answer 1

Current Scientific Theories indicate that the Earth was formed 4.6 billion years ago by the various rocks and other materials that expanded after the Big Bang, and likely other Cosmic Materials that contributed to the formation of other planets. Asteroids were common, and each time they hit what would be the Earth, the cycle of "cooling down" the crust was interrupted, but the total mass of the Earth would grow.

[Think of it like mashing two pieces of clay together and rolling them into a ball, and how the ball consistently grows every time in size]

Until eventually the activity likely settled, or the period was long enough without large asteroids or collisions with large planetary bodies. Comets and general weathering and presentation of chemicals into the environment produced the gases of the atmosphere, plant life logically forming first and transforming CO2 into Air, thus allowing for the evolution of life from sea-based to land-based. More formations, as well as the theory of plate tectonics, would give the earth its current shape.

Answer 2

There are probably a great number of things in the universe that are 4.6 billion years old, but the one we're most familiar with is our solar system. We believe that our Sun and its system of planets formed about 4.6 billion years ago. No EXACTLY 4.6 billion years ago, of course, but within plus or minus no more than about 10% of that.

Answer 3

In theory, yes. Many scientists believe that the Earth formed 4.6 billion years ago. They came to this conclusion by studying rocks and stones deep in the Earth. No one can be sure though.

Answer 4

In a nebula.