Nebular hypothesis Nebular Hypothesis Denser and hotter center became sun

Nebular hypothesis nebular hypothesis denser and

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Nebular hypothesis - Nebular Hypothesis: Denser and hotter center became sun Earth’s layers and characteristics - Core: Two parts (solid inner core and liquid outer core) - Mantle: Most of Earth’s inferior - Crust: Outer thin skin of Earth (two different types: continental and oceanic) Characteristics of continental and oceanic Crust - Ocean Crust: Basalt forms it (black and dense)
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- Continental Crust: Granite forms it (grey, less dense) Characteristic of Lithosphere and Asthenosphere - Lithosphere: Brittle, cold uppermost mantle and crust - Contains all of the cold, hard, solid rock of the planet’s crust (surface) - The hot, semi solid rock that lies underneath the crust - The hot liquid rock near the center of the planet - Solid iron core (center) of the planet - Asthenosphere: Weak, warm zone (non-brittle) upper mantle below lithosphere Composition and structure of modern atmosphere - Atmosphere extends from Earth’s surface upward for hundreds of km’s - No distinct top - Layer of gases held in place by gravity - Contains oxygen and carbon dioxide - Large volumes of water and carbon dioxide (Co2) removed and oxygen added - Contains 78% of nitrogen and 20% of oxygen (make up over 99% of atmosphere) Ozone layer and benefits - Within stratosphere - Molecules: O3 - Protect from UV radiation that causes sunburn and skin cancer Hydrosphere reservoirs - Ocean’s largest reservoir (97% of Earth’s water) - Most of the water is frozen in glaciers (70%) and the rest underground. Water cycle - Hydrosphere interacts with other Earth systems - Fueled by Sun Glaciers and modern trends - Continental glacier: ice buildup spreads under its own weight - Mulan: River from the surface of the Greenland ice sheet to its base
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