What are the theories of the Earth's origin?

Question

What are the theories of the Earth's origin?

Answer 1

big bang or if you're not scientifically inclined, it was created by god

Answer 2

Theories of Earth's Origin:

1) The planets were spun off of the sun :  This theory suggests that the planets were spun off of the sun, and are thus essentially daughters of the sun. This requires a near collision with a large body.

  

Does it fit the facts? If this were the way that the solar system formed, then:

•the sun would have most of the angular momentum

•The sun would

be less massive than it is.

  

2)  The nebular cloud hypothesis:  Suggests that the solar system started out as a nebular cloud an that the planets and sun were concentrated from the dust and gasses in the cloud by gravitational attraction.

•cloud would have been 30-40 light years accross

•mass of cloud would have been 2 -10 times the present Solar System mass.

•originally extremely thin

•coalesced by gravity and magnetic attraction

•Collision heated sun until it started spontaneous fusion

•initial solar wind drove off Earth's light elements, primitive Earth atmosphere--what is left is only 1/1200 of original mass.

3) The Heating, Cooling and Coalescing of the Earth :

  

•Initial accretion of the Earth was cool

•heat originated from collision, radioactive decay.

•heavy elements (nickel and Iron) migrated to center to form core by gravity as material became molten; lighter material floated to the top to form crust, and material of intermediate density formed the mantle.

•Earth began to cool, but the inside continues to be heated by radioactive decay.

4) Big Bang Thoery :  As the name suggests the origin was because of a large collision.

5)  Divine creation:  The earth is God's divine creation and thus is not scientific when it comes to explanation.

Answer 3

The Big Bang Theory

Divine Theory of Creation