Earth's Interior

These are yellowish-green pieces of rock from the ancient Greek words which mean foreign and rock.

(a)  

The following ideas show the types of evidence used by geologists to study and learn the unseen interior of the Earth EXCEPT.

(a)   brings up many samples or rock and gives geologists many clues.

The rocks carried by volcanic eruption to the surface from depths of more than 100 kilometers provide more information about Earth's interior.

Some rocks from mountain ranges show evidence that they formed deep within Earth's crust.

(a)   are caused by the sudden movement of materials within the Earth such as volcanic eruptions, explosions, landslides and avalanches.

How do scientists learn about Earth's interior?

Earthquakes produce different types of seismic waves whose speed and paths give geologists clues about the structure of the Earth's interior.

P-waves travel all the way through Earth, but S-waves do not.