ENV100Y5 Lecture Notes - Lecture 8: Subduction, Mantle Convection, Continental Crust
69
ENV100Y5 Full Course Notes
Verified Note
69 documents
Document Summary
Waves have to change velocity when it goes through layers they have to bend/refract the path of waves is the most important thing that tell us about waves + earthquakes. Some waves are refracted when they travel more quickly through some layers. S waves don"t go through the outer core (its liquid), they just go around it on either side. Core: made of fe-ni metal there"s an inner core and an outer core. The inner core is solid, the outer core is liquid. The outer core has to be liquid to generate magnetic field. The temperature is really high in inner core so it should melt + be a liquid, but the pressure is also so high that it doesn"t. Mantle this is the main volume of the planet, dense rock but not as dense as the core. Has asthenosphere = the upper layer of mantle, below lithosphere, weak + squishy. Asthenosphere can be pushed in response to earth"s temperature.
