A: While different than social revolutions, like the French and Russian Revolutions, the American Revolution put in motion a series of governmental, legislative and social changes that proved monumental.
The Crust is the thinnest layer in the earth. The Mantle is very massive (huge) if you don't get huge imagine it takes up 80% of the earth now that is huge. The outer core is made of iron and nickel. The inner core is the most inner layer it is very solid.
Earth's mantle extends to a depth of 2,890 km, making it the thickest layer of Earth. The upper mantle is divided into the lithospheric mantle and the asthenosphere. The upper and lower mantle are separated by the transition zone. The lowest part of the mantle next to the core-mantle boundary is known as the Dâ³ layer. The pressure at the bottom of the mantle is ~140 G Pa (1.4 M atm).