Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
25 Cards in this Set
- Front
- Back
|
oceanic crust |
-thin -dense(sinks under c. crust) -young |
|
|
continental crust |
-thick -less dense -mostly old |
|
|
outer core |
liquid iron & nickle |
|
|
inner core |
solid iron & nickle |
|
|
mantle |
-plasticity (rock can move) -beneath crust |
|
|
lithoshpere |
uppermost mantle rigid layer |
|
|
asthenosphere |
below lithosphere less rigid layer |
|
|
mesosphere |
layer of solid mantle rock |
|
|
Alfred Wagner continental drift hypothesis |
-pangea 1.continental puzzle- coastlines fit together 2.fossil organisms- found on diff landmasses 3.mountain belts-end at one coastline, begin at another 4. glacier evidence- not in right climate |
|
|
Divergent plate boundaries |
-plates move apart -new material erupted to fill gap |
|
|
Transform plate boundaries |
plates slide past each other earthquakes |
|
|
rifting |
continent breaks apart -continental crust acts as insulator & prevents heat from earth's interior from escaping |
|
|
terrain |
piece of lithosphere that has unique geological history |
|
|
Climate change/cycle
|
as continents drift, global temperatures change |
|
|
continental margins |
-shallow parts of continental crust on ocean floor -line that divides continental from oceanic crust |
|
|
trenches |
form when one tectonic plate subducts below another earthquakes, volcanic mountains |
|
|
mid-ocean ridges |
form when plates pull apart from each other form underwater mountain ranges that run along ocean floor |
|
|
focus |
where first motion of earthquake occurs |
|
|
epicenter |
point on surface directly above focus found with 3 seismographs |
|
|
P-waves |
-fast -travel through solid,liquid,and gas -front to back |
|
|
S-waves |
-slow -travel through only solids -up and down |
|
|
Surface waves |
travel below or along ground's surface rolling and side to side movement |
|
|
composite cone volcano |
-alternating quiet and explosive eruptions -built of lava, cinders, and ash -also called "strato" volcano |
|
|
cinder cone volcano |
-explosive eruptions -steep sides -smaller than composite and shield volcanoes |
|
|
shield volcano |
-quiet eruptions -gentle sloping sides -largest |
