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 273 days ago|7/16/2013 12:13:34 PM
0 Answers/Comments
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 273 days ago|7/16/2013 12:10:18 PM
0 Answers/Comments
Home | Contact | Terms | Privacy | Social | ©2013 Purple Inc.

Who is Weegy? Ask a question. Get an instant answer from an advanced search engine and us (a team of really smart live experts). Free forever.

*The image of Weegy is a photo mosaic of 5,000+ experts. View and download.

Popular Conversations
The Cultural Revolution was a plan to a. make Chinese culture popular ...
Weegy: The Cultural Revolution was a plan to replace ancient culture with a socialist culture. As well as removing ...
4/15/2014 2:15:34 PM| 13 Answers
(–7x – 5x4 + 5) – (–7x4 – 5 – 9x) A. 2x4 + 2x + 8 B. –14x4 + ...
Weegy: Assuming the 4's are exponents: ( 7x ? 5x^4 + 5) ? ( 7x^4 ? 5 ? 9x) = D. 2x^4 + 2x + 10. User: What is the ...
4/14/2014 1:29:57 PM| 8 Answers
How many terms are in the expression 5m2 - mn + 4n + 7? 2 3 4 ...
Weegy: 81.56 + n - 2.55 = 79.01 + n User: Simplify 3x + (-12x) - 5x. -14x -9x 10x 20x Weegy: A)-14x. 3x + (-12x) ...
4/14/2014 1:21:08 PM| 6 Answers
1. Simplify the expression. 22 + (32 – 42) User: 3. Evaluate the ...
Weegy: 4y + 5 = ? 31 4y = -31 - 5 4y = -36 y = -36/4 y = -9 User: Solve the equation. Check your answer. 3x – 7 = ...
4/15/2014 4:20:45 PM| 4 Answers
What is the slope of the line that passes through the points (-2, ...
Weegy: (-3)^-2 = 1/(-3)^2 = 1/9 User: What is the slope of the line that passes through the points (3, -2) and (9, ...
4/15/2014 6:30:47 AM| 3 Answers
The ability to produce a product most efficiently given all the other ...
Weegy: The ability to produce a product most efficiently given all the other products that could be produced - a. ...
4/14/2014 8:37:20 PM| 2 Answers
What causes people to take credit for success and deny responsibility ...
Weegy: bias self-indulgence User: What is the first stage of perception?
4/14/2014 9:24:59 PM| 2 Answers
Its ____ makes Sirius the brightest star in the night ...
Weegy: D. Absolute Magnitude - Makes sirus the brightest star in the night sky. :)
4/14/2014 10:37:55 PM| 2 Answers
All of the following were achievements of the Sumerian culture ...
Weegy: All of the following were achievements of the Sumerian culture except the Great Pyramid.
4/15/2014 6:46:30 AM| 2 Answers
Weegy Stuff
S
L
P
C
P
C
1
L
P
C
Points 1209 [Total 9090]| Ratings 0| Comments 1209| Invitations 0|Offline
S
L
P
C
L
P
C
Points 1176 [Total 6563]| Ratings 0| Comments 1176| Invitations 0|Offline
S
1
L
1
L
P
Points 380 [Total 7057]| Ratings 1| Comments 370| Invitations 0|Offline
S
L
Points 326 [Total 2773]| Ratings 2| Comments 296| Invitations 1|Offline
S
Points 137 [Total 553]| Ratings 0| Comments 137| Invitations 0|Offline
S
1
Points 136 [Total 466]| Ratings 3| Comments 106| Invitations 0|Offline
S
R
Points 95 [Total 207]| Ratings 5| Comments 35| Invitations 1|Offline
S
Points 92 [Total 736]| Ratings 1| Comments 82| Invitations 0|Offline
S
Points 83 [Total 83]| Ratings 4| Comments 23| Invitations 2|Offline
S
P
C
L
P
Points 76 [Total 3921]| Ratings 0| Comments 76| Invitations 0|Offline