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
17,168,966 questions answered
Popular Conversations
what is the mode of 3, 7, 9, 2, 5, 3, 4, 6, 1, 0 User: {3, 7, 9, 2, ...
Weegy: I assume you mean divided by and the answer would be 1 User: {3, 7, 9, 2, 5, 3, 4, 6, 1, 0} the mode of these ...
8/28/2014 10:48:20 AM| 3 Answers
x/8-6>2
8/28/2014 2:19:03 PM| 3 Answers
Control programs are also known as
8/28/2014 2:34:02 AM| 2 Answers
Which individual or entity is responsible for conducting long-range ...
Weegy: Logistics section is responsible for conducting long-range and/or contingency planning. ........... User: ...
8/28/2014 6:22:01 AM| 2 Answers
My Section supports the incident response by overseeing contracting ...
Weegy: Answer: Logistics section Chief
8/28/2014 6:22:50 AM| 2 Answers
4(x-7)=2
Weegy: x - 2 = 7 x = 7 + 2 x = 9 User: 4t-13=57
8/28/2014 7:05:07 AM| 2 Answers
14 · (4 + 3)-1
8/28/2014 10:27:42 AM| 2 Answers
The symbol for the hydronium ion is _____. H+ H3O- H3O+ OH-
Weegy: The symbol for the hydroxide ion is OH- .
8/28/2014 11:35:15 AM| 2 Answers
the largest consumers of water
8/28/2014 12:55:58 PM| 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
Points 2528 [Total 24128]| Ratings 4| Comments 2488| Invitations 0|Offline
S
L
1
L
Points 2108 [Total 6084]| Ratings 8| Comments 2028| Invitations 0|Offline
S
L
C
P
C
1
L
L
Points 2024 [Total 15638]| Ratings 11| Comments 1914| Invitations 0|Offline
S
L
P
C
L
P
C
P
C
L
P
C
P
C
P
C
Points 1940 [Total 16967]| Ratings 6| Comments 1880| Invitations 0|Offline
S
L
1
1
1
1
L
1
Points 1844 [Total 9551]| Ratings 2| Comments 1824| Invitations 0|Offline
S
L
P
C
P
C
1
L
P
C
L
P
C
P
C
P
C
P
C
Points 900 [Total 18471]| Ratings 0| Comments 900| Invitations 0|Offline
S
1
L
L
Points 548 [Total 5112]| Ratings 0| Comments 548| Invitations 0|Offline
S
1
L
1
L
P
P
L
Points 543 [Total 11204]| Ratings 1| Comments 533| Invitations 0|Offline
S
Points 384 [Total 587]| Ratings 1| Comments 374| Invitations 0|Offline
S
Points 366 [Total 366]| Ratings 2| Comments 316| Invitations 3|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.