Flashcards
ProtoEarth (10)
Flashcards do conjunto (3)
- 1What is the Protoearth?-The earliest Earth (4.5 Ga- cold ball of rock, debris, gas)
- No core, mantle, or curst
- ~homogeneous - an ~even mix of rock and metal. - 2☼How did the Earth’s core form?☼Heating, melting, and density stratification.
Iron catastrophe - Heating caused most iron to melt and sink to the center. - 3☼What were the three sources of heat that resulted in the formation of the core?☼Friction & impacts & radioactivity
(Radioactivity was most important source)