How is the deep interior of the earth mapped

ANSWER:

The study of the seismic waves and how these are bent, reflected, sped up or delayed in the various interior layers of the earth is used to map the interior layers of the earth and get information on them.

EXPLANATION:

The deep interior of the earth cannot be drilled in with holes to study about it. All 'layers of the earth' except the crust cannot be drilled into to study about them. Scientists study these deep interior layers of the earth by watching seismic waves that are caused by earthquakes.

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;