Earth's formation
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What are the 3 heat sources that made earth hot enough to form
Bombardment(asteroids and such), extreme pressure, and radioactive decay
what is radioactive decay
materials that come to earth that are undergoing radioactive decy
what is evidence that earth has liquid layers
earthquake/seismic waves refract due to liquid and change directions and slow down
what are the compositional layers of the earth
mantle, core, and crust
what are the mechanical layers of the earth
lithosphere, asthenosphere, mesosphere, outer core, inner core
what mechanical layers of the earth are solid
lithosphere, asthenosphere(BOTH), mesosphere, and inner core
what mechanical layers are liquid
asthenosphere(BOTH) and the outer core
what is the order of the layers
continental crust, oceanic crust,lithosphere, upper mantle, astehnosphere, mesosphere, outer core, inner core
what is a part of the crust
continental crust and oceanic crust
what is the composition of the crust
granite and basalt
what is the thickness of the crust
5-70KM
what is the state of matter of the crust
solid
what is a part of the mantle
lithosphere, upper mantle, asthenosphere, and mesosphere
what is the composition of the matnle
iron and magnesium
what is the thickness of the mantle
2,900 km
what is the state of matter in the mantle
solid and semi-solid
what is the composition of the outer core
iron and nickel
what is the thickness of the outer core
2,200 KM
what is the state of matter of the outer core
liquid
what is the composition in the inner core
iron and nickell
what is the thickness of the inner core
1250 KM
what is the state of matter in the inner core
solid
where are the convection currents
asthenosphere
why/how do convection currents happen
warmer liquid gets more less dense and colder water gets more dense. the colder water sinks to the bottom and the warmer to the top, but the colder water eventually gets warmer than the warm water and goes to the top.