Answer:
yes indeed your right but
<span><span><span>The crust: low density silicate rock, 5-70 km thick. There are two distinct types of crust.<span><span>Continental crust is variable in thickness and composition. Thickness ranges from 5-70 km. The composition ranges from mafic to felsic.</span><span>Oceanic crust is uniform in thickness and composition. It is 5-6 km thick and is mafic in composition.</span><span>The differences in thickness and density between continental and oceanic are responsible for the existence of ocean basins due to isostatic balance as the crust floats on the more dense mantle.</span></span></span><span>The mantle: high density, ultramafic silicate rock which can flow when subjected to long duration stresses. The mantle is over 2900 km thick and makes up over 80% of the volume of the Earth. The mantle is not molten!</span></span><span>The core: iron and nickel, liquid outer region with a solid center. The core is just over half the diameter of the Earth.</span></span>
Answer:
Jim Crow laws - Cause
Jim Crow laws were laws in the Southern States that disenfranchised African Americans, made segregation legal, gave support to hate organizations like the KKK, and reduced their economic opportunities. Jim Crow Laws were one of the main motivations for African Americans to migrate to the Northeast and the Midwest.
More segregated neighborhoods in the North - Effect
Most African Americans emigrated to low-income neighborhoods of urban areas in the Northern states. As soon as they began to move in, most white people left, as some government policies like redlining also promoted this increased segregation.
Harlem Renaissance - Effect
The Harlem Renaissance was an African American cultural movement that emerged in the Harlem neighborhood of Manhattan during the first decades of the XX century. It was caused by the Great Migration due to the large number of black people who moved there during this period.
Violence toward African Americans - Cause
Violence toward African Americans in the South was common during and after the Reconstruction Era. Lynchings and hangings were common, and supported by the authorities. This was one of the main motivations for African Americans to migrate to the North.
The Muslims faith benefited the entire region during their golden age when the Sufi missionaries spread Islam which brought messages to different regions around the world. Some of the principal locations were Ancient Mesopotamia, Persia, North Africa, and Central Asia.
As a result of the energy crisis, in 1973-1974, U.S citizens became aware of ecology. If not, their environment would be endangered.
