Sci rev

What type of Crust is denser?

• Continental

• Oceanic

The following layers are (a)   layers; Lithosphere, Asthenosphere, mesosphere, inner and outer core

semi-solid, rocky, very hot layer, makes up 80% of the Earth and 

carries most of its mass

• Core

• Mantle

• Crust

• Lithosphere

 is the solid upper mantle that is so hot it behaves plastically

And can flow.

• Lithospehere

• Asthenosphere

• Mesosphere

• Crust

composed of both the crust and the portion of the upper mantle

that behaves as a brittle, rigid solid. It is the outermost mechanical layer.

• asthenosphere
• lithosphere
• mesosphere
• core

 sometimes known as the more rigid and immobile than the

Asthenosphere.

• Core
• Mesosphere

• Mantle
• Asthenosphere

The following are (a)   layers ; Crust, Mantle, Core

theory that suggests that the planet was once a molten ball, and in the process of cooling, the surface shrunk producing mountain ranges.

• Contraction Theory -- James Dwight Dana

• Continental Drift Theory -- Alfred Wegener

• Seafloor spreading Theory -- Harry Hess

• Subduction Theory -- J. Tuzo Wilson

 explains how tectonic plates interact with each other. It suggests that when two plates collide one plate is forced beneath the Earth’s mantle, known as ----

• Contraction Theory -- James Dwight Dana

• Continental Drift Theory -- Alfred Wegener

• Seafloor spreading Theory -- Harry Hess

• Subduction Theory -- J. Tuzo Wilson

 suggested that all of the continents were once a big landmass called Pangaea.

• Contraction Theory -- James Dwight Dana

• Continental Drift Theory -- Alfred Wegener

• Seafloor spreading Theory -- Harry Hess

• Subduction Theory -- J. Tuzo Wilson