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chapter 5
earth's structure
Term | Definition |
---|---|
sphere | shaped like a ball, with all points on the surface at an equal distance from the center |
geosphere | Earth's entire solid body |
gravity | the force that every object exerts on every other object because of their masses |
density | the amount of mass in a material per unit volume |
crust | the brittle, rocky outer layer of Earth |
mantle | the thick middle layer in the solid part of Earth |
lithosphere | scientist group the crust and the uppermost mantle into a rigid layer |
asthensphere | plastic layer within the mantle |
core | the dense metallic center of Earth |
magnetosphere | the outer part of the magnetic field that interacts with these particles |
landform | topographic features formed by processes that shape Earth's surface |
plain | landforms with low relief and low elevation |
plateau | area with low relief and high elevation |
mountain | landforms with high relief and high elevation |