Making of planet earth  

Earth came from the sun, a planet named Teia was in our rotation and one day Earth and Teia hit each other, Teia was destroyed by planet earth (because of the size diference), and some bits of the planet Teia gandered around and formed our moon which is a secondary planet.

 

Earth, at that time was an ocean of lava, after the moon formed, Earth was forming more than just lava, rocks were formed, 4500 millions of years ago, and Earth was still 100 years old which is young for a planet, now our planet has 4600 million years and is stable for some years