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Q: In which direction or directions do seafloors spread?
A: 51.5171? N, 0.1062? W London, Coordinates. Please, clarify the question. From which place do you want to know the direction?
Expert answered|RENAT13|Points 0|
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Asked 1/9/2014 9:29:26 PM
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is the outer mantle a liquid or solid
Weegy: This answer depends on whether you are considering the earth in terms of it's chemical or mechanical properties. The three main layers of the Earth based on chemical composition are the core, the mantle and the crust. [ [ The core is the inner part of the earth, the crust is the outer part and between them is the mantle. The Core: At the centre of the Earth is the core. It's upper boundary is approximately 1,800 miles (2,900 km) below the surface. The core is predominately formed of iron (85 %) and nickel (5 %) with a number of siderophile (iron liking elements forming the remainder). It is divided into two layers based on the cores state of matter, the inner core and the outer core. The inner core which is at the very centre of the Earth is a solid layer approximately 780 miles (1,250 km) thick. The core is at a very high temperature and so the outer core is always molten, however as the depth within the core increase the pressure drives the melting temperature up above the in-situ temperatures even though they reach 6700 F (3700 C). The outer core is approximately 1370 miles (2,200 km) thick. It is thought that the movement of the liquid outer core is responsible for the creation of earth's magnetic field. The Mantle: The mantle lies directly above the core (this boundary is known as the core-mantle-boundary or Gutenberg discontinuity and is named after the geophysicist who discovered it (trivia - Beno Gutenberg, the geophysicist in question also worked with Charles Richter in the development of the Richter magnitude scale). It's upper boundary lies approximately 6 miles (10 km) below the surface of the oceanic crust and about 19 miles(30 km) below the surface of the continental crust. The mantle is broadly divided into two main sections. The upper and the lower mantle based on changes in the crystalline structure of the mantle material caused by pressure changes at increasing depths. The mantle is approximately 1,800 miles (2,900 km) thick and makes ... (More)
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Expert Answered
Updated 1/14/2014 10:35:30 AM
2 Answers/Comments
The outer mantle is a liquid.
Added 1/14/2014 10:34:38 AM
This answer has been confirmed as correct and helpful.
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Added 1/14/2014 10:35:30 AM
A seismograph detects earthquake activity, while a seismogram detects plate movements true or false?
Weegy: A seismograph detects earthquake activity, while a seismogram detects plate movements true ] (More)
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Expert Answered
Updated 1/14/2014 10:00:49 AM
1 Answer/Comment
A seismograph detects earthquake activity, while a seismogram detects plate movements. The statement is FALSE. A seiseogram is the picture drawn by a seismograph.
Added 1/14/2014 10:00:49 AM
This answer has been confirmed as correct and helpful.
A seismograph is the graphic records of the movements within the earth, while a seismogram is the instrument that detects those movements true or false?
Weegy: A seismograph is the graphic records of the movements within the earth, while a seismogram is the instrument that detects those movements. The answer is TRUE. (More)
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Expert Answered
Updated 1/16/2014 7:22:00 PM
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Which words in the sentence are the adverb phrase? That old lighthouse has warned sailors for many decades.
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Updated 1/15/2014 3:05:08 AM
1 Answer/Comment
That old lighthouse has warned sailors for many decades.
Adverb phrase: for many decades

Added 1/15/2014 3:05:08 AM
This answer has been confirmed as correct and helpful.
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