Magma that squeezes into a horizontal crack is called a sill. Magma that squeezes into a vertical crack is called a dike.
They are both considered volcanic rocks that form into layers of another rock. In nature, the difference is that sills are horizontal while dikes are vertical.
<span>D. The specialization of labor disappeared during the First Agricultural Revolution.</span>
Serengeti National Park is located in Tanzania.
B dry because winter and summer are dry
, 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.
