Packet 4: Earth’s Interior. Circulation due to differences in density which causes convection...
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QUIZ CARDS Packet 4: Earth’s Interior
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Transcript of Packet 4: Earth’s Interior. Circulation due to differences in density which causes convection...
QUIZ CARDSPacket 4: Earth’s Interior
Circulation due to differences in density which causes convection currents
Earth’s interior is inferred by scientists based on earthquake waves (seismic data) and studying meteorites
ESRT page 10 – Inferred Properties of Earth’s Interior
ESRT front page – Chemical Composition chart
Q4-1: Earth’s Layers
Continental drift suggests present-day continents once fit together like puzzle parts
Earth’s magnetic field has reversed with time
Magnetic reversals (orientation) support theory of seafloor spreading
Rising convection currents cause high-heat floors at the ridge center
Rocks are youngest at ridge, older as you move away
Q4-2: Seafloor Spreading