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Earth Structure and Tectonic Activity (Seafloor Spreading (Magnetic…
Earth Structure and Tectonic Activity
Seafloor Spreading
Magnetic alignment changes in seafloor show that different parts were created at different times
Convection currents create upward and outward movements
Pressure and nuclear fission produce heat
Tectonic Plates and Plate Boundaries
convergent subduction: where the ocean meets continental . crusts, earthquakes, deep-sea trenches and with friction volcanoes and magma can be formed.
Transform: land is neither created or destroyed, but formed because of earthquakes
Convergent Collision: Where to continental plates collide
Type of boundaries
young divergent plate boundary
divergent plate boundary
transform plate boundary,
Convergent plate boundary,
Earth Formation and Structure
collision and gravity caused materials to collide
materials cooled down and formed the earths crust
rocks and metals liquified, because of pressure
after the earth atmosphere was formed temperature cooled down ocean was created making . effect of the water cycle
Conformed by the crust, mantle, outer core and inner core
Things such as volcanoes and seismic waves helps us understand the earths crust.
Continental Drift Theory
EVIDENCE: shape of continents, land forms, and fossils
Alfred Wagner introduced this theory
Pangea was the first super continent and it split into different parts forming new continents