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Creation of Earth and Life
What events took place before life began?
14
History
Not Applicable
09/01/2012

Additional History Flashcards

 


 

Cards

Term
What happens to a very large dieing star?
Definition
A dieing star condenses into some of the most dense elements in the galaxy, such as platinum until it explodes.
Term
What is a Supernova?
Definition

A Supernova is the explosion that comes at the end of the cycle of a

very large dieing star, one of the most powerful explosions in the Universe. 

Term
After a Supernova, what is created in its place?
Definition
A new star with orbiting dust clouds that later create the planets. Many of the planets do not survive the early solarsystem, such as Thia, the fifth planet.
Term
What is the first step to form astroids?
Definition
"Cosmic" dust clouds condense when being struck by the shock waves that come from a Supernova nearby.
Term

What is the same type of

everyday happening that helped the dust in the "cosmic" dust clouds stick together when condensing? 

Definition
static cling
Term

After the dust in "cosmic" dust clouds stick to form small rocks, what property helped the rocks

stick together?

Definition
gravity
Term

True or False:

The bigger something is, the stronger the gravity.

Definition
True
Term
When an astroid gets bigger from rock building up, it's usually a strange shape. What happens to it when it's size gets big enough and its gravatational pull gets strong enough? 
Definition

Its own gravity pulls into itself, changing its shape to a circle or sometimes a slight oval, like Earth.

At this point, it's usually about the size of Earth's moon.

Term
When Earth got about the size that it is today, what catastrophic event occured?
Definition
The "fifth planet that din't survive", Thia, smashed into Earth, sending bits of Earth and Thia into orbit around Earth temporarily.
Term
The debris orbiting Earth from Thia's collision collected to form what?
Definition
Earth's TWO moons
Term
What happened to Earth's two moons?
Definition
They collided, the larger moon practically swallowing the smaller moon, and formed one large moon, the one we see in the night skies today.
Term

True or False:

Earth was a molten world of lava and volcanoes before and after Thia's collision with Earth.

Definition
False: before the collision, Earth's crust was solid and very desert-like.
Term
After Earth's molten crust sank and formed Earth's core, what other planet did it resemle?
Definition
Mars: very desert-like
Term

True or False:

The water on Earth was created here.

Definition

False: water came from astroids in the Astroid Belt in the outer solarsystem, where ice could stay without melting. The astroids that

rained on Earth brought water and created the oceans, and etc.  

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