Because these time periods had been pre recorded down before as soid proof to support that these events during the time periods had actually happened, this is why they both use them, its basically the international time scale used. Scienece homework? lol
how do geologists think earths atmosphere is formed
Geologists have divided Earth's history into manageable units called eons, eras, periods, and epochs. These divisions help scientists study and understand the Earth's geological and biological history over millions of years.
No
geologists
laws of natural
Geologists study the Earths surface
Depth, temperature and pressure barrier.
I don' t know
4.6 billion years
don't no geologists If focusing on the minerals of a rock then it would be classified as a mineralogist.
* landforms are natral features of the earth
Geologists use evidence from seismic waves to learn about earth's interior. Geologists record the seismic waves and study how they travel through earth. By Brianna.