What allowed scientists to confirm their theories that the Earth's interior had layers?
A) A large earthquake that occurred in Alaska
B) A system of 800 seismic stations placed worldwide
C) The correlation between intensity, frequency, and characteristics of waves
D) All of these choices

Question

Quizplus · Accepted Answer

Scientists used various aspects of research to confirm the presence of layers within the Earth. They were able to confirm their theory of layers with information collected during an earthquake in Alaska in 1964. There were 800 stations that recorded information on the waves form the earthquake. Information can be found in the section The Study of Earthquakes Provides Evidence of Layering.

What Allowed Scientists to Confirm Their Theories That the Earth's