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Science 8 Unit 1

TermDefinition
Sphere Denoting a structure or region of spherical form
Atmosphere The envelope of gases surrounding the earth or another planet
Hydrosphere All the water on earths surface
Geosphere Any of the almost spherical concentric regions of matter that make up the earth and its atmosphere
Biosphere The regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms
Gravity The force that attracts a body towards the center of the earth
Density The degree of compactness of a substance
Solar Nebula Describes the formation of our Solar System from a nebula cloud made from a collection of dust and gas
Crust The outer layer of the earth
Mantle The region of the earth's interior between the crust and the core, believed to consist of hot, dense silicate rock
Lithosphere The rigid outer part of the earth, consisting of the crust and upper mantle
Asthenosphere The upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur
Core The dense central region of a planet, especially the nickel–iron inner part of the earth
Magnetosphere The region surrounding the earth or another astronomical body in which its magnetic field is the predominant effective magnetic field
Landform A natural feature of the earth's surface
Plain Plains are broad, nearly level stretches of land that have no great changes in elevation
Plateau An area of relatively level high ground
Mountain A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill
Created by: Curtis2013
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