NATS 1570 Study Guide - Final Guide: Spheroid, Axial Tilt, Liquid Hydrogen

• School: York University
• Department: Natural Science
• Course: NATS 1570
• Professor: Mary- Helen Armour

Document Summary

Oceanic crust consists of basalt and gabbro. Continental crust consists of many rocks. Only 0. 1% to 1. 0% of the earth"s radius (about 100km) Oxygen is most abundant element in the crust, silicon is second: upper mantle and lower mantle. Mantle rock shows plasticity due to heat. Transition zone interval between upper and lower mantle: outer core and inner core. Outer core"s iron alloy is liquid because of high temperatures. Liquid alloy"s rapid flow generates earth"s magnetic field. Inner core is a solid iron alloy that may reach 4700 degrees celsius: lithosphere. Consists of the crust + relatively cool uppermost part of the upper mantle: asthenosphere. Portion of the mantle in which rock is plastic and can flow. Earth"s atmosphere: composed of nitrogen, oxygen, argon and carbon dioxide. As well as methane, helium, and ozone: troposphere lowest layer, contains 80% of atmosphere"s mass, stratosphere second-lowest layer.