How often does the oceanic plate material of the Earth renew itself - in other words - how long to go through one replacement cycle?
A) every 100 million years
B) every 200 million years
C) every 1,000 years
D) every 100,000 years
E) The oceanic plate material never renews itself.

Question

Quizplus · Accepted Answer

The process of seafloor spreading and subduction results in the renewal of oceanic plate material. Studies have shown that the average age of oceanic crust is around 200 million years, which suggests that it takes roughly that amount of time for one replacement cycle to occur. Therefore, choice B is the best answer.

How Often Does the Oceanic Plate Material of the Earth