​There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating. Relative dating is used to determine the relative order of past events by comparing the age of one object to another.​There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating

What is the youngest ocean?

Indian Ocean, body of salt water covering approximately one-fifth of the total ocean area of the world. It is the smallest, geologically youngest, and physically most complex of the worlds three major oceans (Pacific, Atlantic, and Indian).