How have we gained knowledge of Earth's internal structure?
A)analysis of seismic waves passing through Earth's layers
B)direct observation of Earth's inner layers
C)studying rock samples after underground nuclear tests
D)core samples
E)x-rays

Question

Quizplus · Accepted Answer

Seismic waves are waves of energy that travel through the Earth's layers when earthquakes occur or explosive events happen. By analyzing the properties of the seismic waves that travel through the Earth, scientists are able to determine the composition and structure of its various layers.

How Have We Gained Knowledge of Earth's Internal Structure