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Our Changing Earth

Weathering and Erosion, Plate Movements, interior, and rocks

TermDefinition
weathering the process by which rock is broken down into smaller pieces
gravity this can cause rocks to fall down a hill
chemical weathering acid rain causes this
deposition the dropping of weathered rock by wind or moving water
sediment very small pieces of rock;examples include sand and silt
wind and moving water this carries sediment from place to place
erosion removal of soil and rock from the Earth's surface
Grand Canyon formed by the moving water of the Colorado River
crust Earth's rocky outer layer
mantle layer below the Earth's crust
outer core made of molten, liquid metal
inner core made of solid iron and nickel
crust thinnest under oceans and thickest under mountains
mantle contains some liquid rock, but mostly solid rock
outer core source of Earth's magnetic field is Iron from this core
inner core Earth's hottest layer
crust least dense and thinnest layer
mantle most dense and thickest layer
crust hard and made of many minerals
mantle makes up about 2/3 of Earth's mass
convergent when two plates collide or travel toward each other
divergent when two plates move away from each other
transform when two plates slide past each other
convergent this type of boundary forms volcanoes and mountains
divergent this type of boundary forms ridges and rift valleys
transform this type of boundary causes earthquakes
sedimentary rocks formed by compaction and cementation of sediments
sediments small pieces of rock; examples include sand and silt
igneous rocks rocks formed near volcanoes by melting and cooling
metamorphic rocks rocks formed by heat and pressure
Created by: lkcasteel
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