Earth Science-Exam 1 Questions & Answers Already Passed!!

What are the two different kinds of crust? - Answer-Oceanic and Continental Which crust is denser? - Answer-Oceanic Which crust is thicker? - Answer-Continental What specific type of rock is each type of crust made of? - Answer-Continental-granite Oceanic-basalt What layer contains the crust and the upper mantle? - Answer-Lithosphere What is unusual about the Asthenosphere? - Answer-It is partially melted What happens when 2 oceanic plates collide? - Answer-The denser of the 2 plates will subduct to the asthenosphere What feature is produced from the colliding of the continental and oceanic plate? - Answer-volcanic Island Arc Why does an oceanic plate ALWAYS subduct beneath the continental plate? - Answer-Because the continental plate is light and cannot sink into the mantle the oceanic plate will always be the denser of the 2 Along what type of plate boundaries does explosive(intermediate-felsic) volcanism occur? - Answerconvergent p.b Along what type of p.b does passive(mafic) volcanism occur? - Answer-divergent p.b Where along the 48 states is plate collision currently taking place? - Answer-California, Oregon and WashingtonWhat feature has formed as a result of this collision? - Answer-continental volcanic arc-cascade range What and where is the most famous transform p.b. in North America? - Answer-san andreas fault in central and southern California What is a hot spot? - Answer-Huge column of every hot rock rising from great depth; a volcanic zone located about hot rising plumes Where are the two hot spots in the USA? - Answer-Hawaii and Wyoming What 5 qualifications must be met for a substance to qualify as a mineral? - Answer-a. solid b. naturally occurring c. inorganic d. definite chemical composition e. specific internal composition Define the 4 MAJOR physical properties of minerals - Answer-luster- the way that light reflects off of a mineral color, streak, and hardness-a minerals resistance to scratching What 3 factors influence the physical properties of minerals? - Answer-chemical composition, specific internal structure and strengths of the chemical bonds holding the atoms together What is the difference btwn magma and lava? - Answer-magma- exists within the earths surface lava- exists upon earths surface