The astenosphere plays a key role in the plate tectonics theory because it is the one that provides the high temperatures, high pressure, and magma, that are the ones responsible for cracking up the crust on the surface.
The astenosphere, with the ability to crack the crust on the surface of the planet is creating the continental and oceanic tectonic plates, and it also provides the push force from bellow so that they can move across the globe and thus be creating the landscape on the planet.
Scientists<span> can tell by observing the seismic waves that are recorded all over the surface of the </span>earth<span> from distant earthquakes. The seismic waves are reflected (bounced off) </span>layers<span> of different density, and they are refracted (bent) when they enter </span>layers<span> of different density.</span>
Louisiana - Spanning nearly 1 million acres, south-central Louisiana's Atchafalaya Basin is the nation's largest river swamp. A distributary of the Mississippi River, the swamp begins near Simmesport and stretches 140 miles south to the Gulf of Mexico.
Seismograph's drum feel the seismic waves. There is a weight that moves the pen so that when the seismic waves are felt, the pen jiggles and records it on paper.
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World War I was known as the “war to end all wars” because of the great slaughter and destruction it caused. Unfortunately, the peace treaty that officially ended the conflict—the Treaty of Versailles of 1919—forced punitive terms on Germany that destabilized Europe and laid the groundwork for World War II.
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