How do earth born? like in space or just collected by a lot of rock!

It is a collection of many different types of rocks and minerals.

It was was changed over millions of years to form the earth

The minerals formed trees and animals

where as rocks made the ground and core of the earth

This all was because the rocks and random pieces of asteroids accumulated together by colliding with each other and due to the gravity of the total mass the earth was formed

I hope you like :-)

so here's a simple answer, so the earth was always there, a giant planet, but a star was born (the sun)  giving the planet warmth, the warmth helped the minerals in the ground of the planet to grow plants from the earth, and the ice that was mixed with the dirt, turns into water, giving off water to the plants, creating, jungles, deserts, etc.