Question and answer
Describe the “big splash” theory of the Moon’s origin
The giant impact hypothesis (Big Splash) states that the Moon was formed out of the debris left over from a collision between the Earth and a body the size of Mars, approximately 4.5 Gya (four and a half billion years) ago. [ The colliding body is sometimes called Theia, for the mythical Greek Titan who was the mother of Selene, the goddess of the Moon.[1][2] The giant impact hypothesis is the
currently-favoured scientific hypothesis for the formation of the Moon.[3] Supporting evidence includes: the Earth's spin and Moon's orbit having similar orientations,[4] Moon samples indicating the surface of the Moon was once molten, the Moon's relatively small iron core, lower density compared to the Earth, evidence of similar collisions in other star systems (that result in debris disks), and that giant collisions are consistent with the leading theories of the formation of the solar system. Finally, the stable isotope ratios of lunar and terrestrial rock are identical, implying a common origin.[5] There remain several questions concerning the best current models of the giant impact hypothesis, however. The energy of such a giant impact is predicted to heat Earth to produce a global 'ocean' of magma; yet there is no evidence of the resultant planetary differentiation of the heavier material sinking into Earth's mantle. At present, there is no self-consistent model that starts with the giant impact event and follows the evolution of the debris into a single moon. Other remaining questions include when the Moon lost its share of volatile elements and why Venus, which also experienced giant impacts during its formation, does not host a similar moon. Answer found on: ]
Expert answered|hellphoenix|Points 69|
Question|Rated good
Asked 7/16/2013 12:13:34 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
What elements make up the Earth’s mantle User: What is Earth’s mantle
Weegy: The Earth's mantle is a roughly 1,800 mile (2,900 km) thick shell of compressed and heated rock, beginning below the Earth's crust (lithosphere), [ which extends 3.1 miles (5 km) below the ocean floor and 19 to 31 miles (30 to 50 km) below the continents. Read more ] (More)
Question
Expert Answered
Asked 7/16/2013 12:10:18 PM
0 Answers/Comments
17,476,031 questions answered
Popular Conversations
He was arrested for A. misogyny. B. bigamy. C. philanthropy. D. ...
Weegy: He was arrested for: BIGAMY. User: A neurotic is suffering from A. neurasthenics. B. neurosis. C. ...
9/22/2014 5:30:20 PM| 4 Answers
What is the value of p – (–3.5) when p = 8.2? User: What value of x ...
Weegy: –7.12 = –4.8 + x -7.12 = -4.8 + (-2.4) x = -2.4
9/22/2014 6:03:27 AM| 2 Answers
A system of two linear equations has no solution. How is this ...
Weegy: A system of two linear equations has an infinite number of solutions if B. The two equations are the same line. ...
9/22/2014 8:57:21 AM| 2 Answers
Find the equation of the line through the point (–2, –2) that is ...
Weegy: The slope of the line that is perpendicular to the line whose equation is 2x + y = 4 is 1/2. User: Two ...
9/22/2014 10:16:53 AM| 2 Answers
Which sentence below has the subordinate clause underlined? A. In ...
Weegy: Please indicate the underlined part in the sentence. So we can answer your question. User: Which of the ...
9/22/2014 10:24:45 AM| 2 Answers
Select the correct pronoun. The people _____ arrived late had ...
Weegy: A demonstrative pronoun represents a thing or things: 1. near in distance or time (this, these) 2. far in ...
9/22/2014 10:34:55 AM| 2 Answers
In order to save fabric for the war, most men wore a
Weegy: In order to save fabric for the war, most men wore a "victory suit" User: Taken together, the growth of ...
9/22/2014 11:41:15 AM| 2 Answers
Which of the following is a nonrenewable ...
Weegy: COAL is a nonrenewable resource. User: Which of the following is true about glass recycling? a. Recycling ...
9/22/2014 11:55:18 AM| 2 Answers
Weegy Stuff
S
R
L
1
1
P
C
1
P
1
1
L
P
C
P
C
1
P
C
L
P
C
1
P
C
P
C
P
C
L
Points 2457 [Total 26855]| Ratings 5| Comments 2407| Invitations 0|Offline
S
L
1
L
P
C
1
Points 2177 [Total 8708]| Ratings 9| Comments 2087| Invitations 0|Online
S
L
C
P
C
1
L
L
P
C
1
Points 1901 [Total 17840]| Ratings 13| Comments 1771| Invitations 0|Offline
S
L
1
1
1
1
L
1
L
Points 1894 [Total 11674]| Ratings 0| Comments 1894| Invitations 0|Offline
S
L
P
C
L
P
C
P
C
L
P
C
P
C
P
C
Points 1676 [Total 18848]| Ratings 6| Comments 1616| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 654 [Total 11900]| Ratings 0| Comments 654| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
L
P
C
P
C
P
C
P
C
Points 583 [Total 19114]| Ratings 1| Comments 573| Invitations 0|Offline
S
L
Points 550 [Total 1220]| Ratings 0| Comments 550| Invitations 0|Offline
S
1
L
L
Points 449 [Total 5572]| Ratings 4| Comments 409| Invitations 0|Offline
S
Points 64 [Total 64]| Ratings 2| Comments 34| Invitations 1|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.