, the world was made up of a single continent through most of geologic
time. That continent eventually separated and drifted apart, forming
into the seven continents we have today. The first comprehensive theory
of continental drift was suggested by the German meteorologist Alfred Wegener
in 1912. The hypothesis asserts that the continents consist of lighter
rocks that rest on heavier crustal material—similar to the manner in
which icebergs float on water. Wegener contended that the relative
positions of the continents are not rigidly fixed but are slowly
moving—at a rate of about one yard per century.
The distribution of ancient fossils, Rock and mountain ranges, Climate zones
Sparta and Athens were city-states in the country of Greece.
Answer:
crust- the earth's outmost layer
inner core- the metallic layer at the earth's center
lower mantle- hottest part of the mantle
asthenosphere- the semi solid layer between the top layer and the upper mantle
upper mantle- The layer between the asthenosphere and lower mantle
top layer- The firm layer between the crust and the asthenosphere
outer core- The layer surrounding the inner core
Explanation:
