Question

PLEASE HELP BEFORE IM LATE....
how have scientist been able to determine the composition of earths layer?


earth science

Answer 1

Hi. Scienctists have been able to determine the composition of earth's layer because of how the seismic waves change speeds as they travel through Earth. 

Answer 2

Answer:

By looking at how seismic waves change speeds as they travel through Earth.

Explanation:

By looking at how seismic waves change speeds as they travel through Earth.