Activity 3 - Earth Formation

pptx

School

Georgia State University *

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Course

1101

Subject

Astronomy

Date

Oct 30, 2023

Type

pptx

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Uploaded by MateMaskPartridge11

INSTRUCTIONS INSTRUCTIONS  Re-order the slides so the events occur in the correct order, with the oldest event as slide 2, and the youngest event as slide 13. Then save and submit to the correct iCollege assignment folder.  Re-order the slides so the events occur in the correct order, with the oldest event as slide 2, and the youngest event as slide 13. Then save and submit to the correct iCollege assignment folder.

The Big Bang

The now differentiated ice, gas, and dust of the solar accretion disc conglomerates together into asteroids from gravity

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Stars made of only Hydrogen and Helium burn out and die in Novae and Supernovae, producing nebulae rich in heavier elements in the process. This cycle repeats several times

Formation of the Milky Way Galaxy from coalescing of early stars and interstellar gas and dust

A nebula collapses from the force of gravity. Our Sun is born with a rotating accretion disc made from the remainder of the nebula surrounding it

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Solar wind, being highly charged material ejected from the sun, pushes lighter elements in the solar accretion disc, such as Hydrogen and Helium, to the outer reaches of the Solar System. Heavier elements such as Iron, Nickel, and Silicon remain close to the Sun

Asteroids continue colliding into each other, eventually forming large protoplanets. The inner protoplanets, one of which being Earth, are liquid from the immense heat of all the collisions and internal movement

“The Big Whack” A Mars-sized protoplanet we call Theia collides with primitive Earth, adding even more energy and mass

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The debris from the collision of Earth and Theia produce a ring in orbit. This ring eventually coalesces into the Moon, just as Earth coalesced from the solar accretion disc

Now at roughly 100% of present-day mass and the asteroid bombardment over, Earth begins cooling and differentiating. As the outer layer of the Earth cools and solidifies, lighter elements and compounds rise to the surface while the denser ones sink to the core

As differentiation continues, the lightest elements and compounds outgas in a series of eruptions. These gasses form our early atmosphere

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