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 281 days ago|7/16/2013 12:13:34 PM
0 Answers/Comments
Ask a question
Not a good answer? Get an answer now. (FREE)
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
Education|No Subcategories|Expert Answered
Asked 281 days ago|7/16/2013 12:10:18 PM
0 Answers/Comments
Home | Contact | Terms | Privacy | Social | ©2013 Purple Inc.
Ad
Popular Conversations
The question below refers to the selection "By the Waters of ...
Weegy: The question below refers to the selection "By the Waters of Babylon." The many lights that John sees in his ...
4/22/2014 8:51:50 AM| 5 Answers
Identify the function of the italicized noun clause. Cousin Jake's ...
Weegy: The function of the noun clause "that he run the mile in less than four minutes" is a NOUN PHRASE COMPLEMENT.
4/22/2014 9:51:58 AM| 4 Answers
Which sentence uses a verb that agrees with its compound subject? ...
Weegy: Which sentence uses a verb that agrees with its compound subject? A. Pumpkins and grapes are grown on vines. ...
4/22/2014 12:24:12 PM| 4 Answers
Who is the owner of GTV vodka
Weegy: Birdman, the rapper, is the owner of GTV vodka.
4/22/2014 11:38:15 PM| 4 Answers
(x 2 + 4x + 8)(2x - 1)
Weegy: Simplify: 2x - 8 = 2x - 3. As you can see, there are no values of x that make the equation true. Subtracting 2x ...
4/22/2014 7:19:21 AM| 3 Answers
Ethiopians learned Christian traditions from ___________. a. their ...
Weegy: Ethiopians learned Christian traditions from the Hebrews.
4/22/2014 7:36:55 AM| 3 Answers
If x varies inversely with y and x = 4 when y = 9, find x when y = 6. ...
Weegy: (3x-2) squared is 9x^2 - 12x + 4. User: Find the general term for the sequence -3, 1, 5, 9, .... Weegy: -6
4/22/2014 8:28:58 AM| 3 Answers
How many terms are in the expression shown below? x2 - 10xy + 3y + ...
Weegy: There are 5 terms in the expression x2 - 10xy + 3y + y2 - 1. User: Find the value of 21 - 18 ÷ 3 · ...
4/22/2014 1:25:53 PM| 3 Answers
Solve for x. x - 8 = -20 -28 -12 12 28
Weegy: 6(x - 2) = 4, 6x - 12 = 4, 6x = 4 + 12, 6x = 16, x = 16/6, or 8/3 in simplest form. User: The sum of ...
4/23/2014 1:27:55 PM| 3 Answers
Which of the following represented loyalty to church before loyalty ...
Weegy: D. User: The Glorious Revolution took place in response to the __________. a. actions of James II c. Articles ...
4/22/2014 4:08:32 AM| 2 Answers
At the incident scene, who handles media inquires? A. Public ...
Weegy: At the incident scene, who handles media inquires? D. Communications Officer User: The Liaison Officer: A. ...
4/22/2014 6:09:11 AM| 2 Answers
Weegy Stuff
S
L
P
C
L
P
C
Points 1845 [Total 7232]| Ratings 0| Comments 1845| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
Points 1766 [Total 9647]| Ratings 0| Comments 1766| Invitations 0|Offline
S
1
L
C
L
Points 914 [Total 5717]| Ratings 4| Comments 874| Invitations 0|Offline
S
1
L
1
L
P
Points 577 [Total 7254]| Ratings 2| Comments 557| Invitations 0|Offline
S
L
Points 480 [Total 2927]| Ratings 2| Comments 450| Invitations 1|Offline
S
L
1
1
1
Points 316 [Total 3582]| Ratings 7| Comments 246| Invitations 0|Offline
S
R
Points 267 [Total 379]| Ratings 6| Comments 187| Invitations 2|Offline
S
Points 216 [Total 216]| Ratings 6| Comments 136| Invitations 2|Online
S
Points 170 [Total 586]| Ratings 0| Comments 170| Invitations 0|Offline
S
1
Points 165 [Total 495]| Ratings 4| Comments 125| Invitations 0|Offline