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s.s world geo ch4


geology study of earth's physical structures
4 important zones inner core, outer core, mantle, crust
inner core solid, temps and pressure is very high
outer core mostly dense liquid metal( iron and nickel ) temps and pressures are very high
mantle most of earth's mass
crust uppermost layer, 25 miles thick, thin compared to the rest of earth's interior
plate tectonics theory that explains how forces within the planets create landforms
name the diff. ways the plates can move apart, collide, or laterally
spreading plates can create... oceanic ridges undersea( Mid atlantic ridge ) and rift valleys on land( the Great rift valley in Africa )
colliding plates can create... trenches and volcanoes undersea and mountains on land( Himalaya mountains )
plates that move laterally can create... fractures and earthquakes
weathering slow and hard to detect. includes chemical and physical processes
erosion movement of surface material by water, wind, and ice
tectonic processes landforms such as mnts and some valleys are created by volcanoes, folding, and faulting.
erosion this landform is made up of rock and has a thin layer of sediment or soil on the surface, reflect the hardness of underlying rock. ( plateau )
sediment deposited by ice, wind, or water sand dunes or floodplains and an alluvial fan and a delta are also good examples of this this type of landform
__________,____________, and ____________ of landforms have influenced human settlement and transportation throughout history. location, shape, and size
saltwater makes up... 97% of the world's water and is too salty for most uses
freshwater makes up... less than 3% of the world's water, most is frozen in ice caps
less than 1% of freshwater is.. in vapor and liquid form
liquid freshwater can found in two places surface water and ground water
surface water is... in headwaters, tributaries, rivers, lakes, estuairies, and wetlands
ground water is.. stored in soil and water tables
describe the hydrologic cycle powered by solar energy, winds, and gravity. evaporation, condensation, precipitation, then it starts all over again
flooding occurs when... rivers contain more water than they can hold, heavy rain, snow melts, and human activities, such as clearing vegetation to pave roads
effects of flooding erosion, loss of vegetation, drowns both people and livestock, die of diseases
Created by: diva626