social studies terms (part 1)

terms 1

100

the innermost layer of the earths interier 

core 

200

solid outer layer of the earth 

crust 

300

middle layer of earth between crust and core 

mantle 

400

molten rock within earth 

magma 

500

the therory that earths plates interact to produce mountins, trenchs, earth quakes, and valcanoes 

plate tectonics 

terms 2

100

therory that earths continental plates are moving 

continantal drift 

200

a section of the earths crust 

plates

300

an area of the earths crust where one plate slides beneath another 

subduction zone 

400

natural features of lands surface 

topography 

500

is an areas landforms togeather with its cover pf vegatation water, rock, ice 

landforms 

terms 3

100

is used to describe the height of a landform. measured from sea level 

elavation 

200

is the diffrence of elavation between points on earths surface 

releif 

300

refears to the steepness of slopes 

gradiant 

400

types of rocks and there historys 

geolagy 

500

discription of landforms 

general apperance 

terms 4

100

the current in a fluid, such as megma that circulates as the fluid is heated and cooled 

convection currets

200

magma that flows onto the earths surface 

lava 

300

dust sized particals emitted by a volcano 

volcanic ash 

400

a long depression produced by the colpase of part of earths crust 

trenches 

500

a long valley caused by fault action along each side 

rift vallys 

terms 5

100

a fracture or break in the rocks of the earths crust along which movement can take place 

fault 

200

folding and faulting to creat mountins 

mountin building 

300

the break down of rock on the earths surrface 

weathering 

400

the wearing down of the earths surface by running water and wind 

erosion 

500

the deposion of eroded material to form new landforms 

deposition