The sun because it provides us energy
Convection currents occur in the MANTLE. The mantle is the second layer of the earth after the crust. The mantle is approximately 2900 km thick. Convection currents are triggered or fueled by the heat from the Earth's core.
The part of the mantle closest to the core gets heated. It then becomes less dense than the layers above so it rises. When this rising plume interacts with the crust it cools and becomes more dense than the layers below and so it sinks and this circular motion continues to form convection currents.
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Active Cell An active cell refers to the currently selected cell in a spreadsheet. It can be identified by a bold (typically blue) outline that surrounds the cell. The standard …
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The process of urbanization in ethiopia is a process of decentralizing development in the region of Ethiopia. The process is often described as the process of developing a new city in Ethiopia, but it is still the prime destination for many migrants.
See also: Ethiopia, urbanization
