Earth Sciences 2240F/G Chapter Notes - Chapter 14: Near-Earth Object, List Of Apollo Asteroids, Amor Asteroid
13 Feb 2018
School
Department
Course
Professor
Document Summary
Chapter 14: impacts from space the basics. There was no more violent period in earth"s history than when it was being built by the accretion of impacting objects. If human civilizations last long enough, earth will be put in jeopardy (and possibly destroyed) by an impact event. Ablation: the removal of material by heating and vaporization as a space object passes through earth"s atmosphere. Accretion: the gradual accumulation of material through the collision of particles . Achondrite: a class of stony meteorite formed by igneous processes; they lack chondrules. Amor asteroid: an asteroid whose perihelion distance lies just outside earth"s orbit but inside the orbit of. Apollo asteroid: an asteroid that passes inside earth"s orbit. Asteroid: a rocky or metallic orbiting body of 100 m or greater diameter. Astronomical unit: the mean distance between earth and sun. Carbonaceous chondrite: a primitive class of chondrite that contains highly oxidized minerals and carbon or organic compounds.
