ENVS 1060 Lecture Notes - Lecture 2: Outer Core
16 Dec 2015
School
Department
Course
Professor
Document Summary
Say how seismic evidence can be used to interpret the earth"s: understand the various layers within the earth, their relative, describe what s-waves and p-waves are and how they behave internal structure. (ans). Seismology is a powerful technique that uses vibrations to determine the various densities of the earth"s internal structure. It involves sending large vibrations down into the earth. Denser materials transmit the energy waves much faster compared to less dense structures. position, thickness, density and composition. (ans). Crust: comprised of oceanic and continental components, rock and brittle, mainly na and ca silicates, apporx. Mantle: mostly iron, magnesium, silicon, aluminum and oxygen, depth of 10-2890 km, 67. 3% of earths mass, convection in this region drives plate tetonics. Outer core: molten, iron and 10% sulphur, depth of approx. 2890-5150km, makes up 30. 8% of the earths mass. Inner core: molten iron, depth of 5150-6370 km, 1. 7% of the earths mass. within the earth. (ans).
