Question

The convection currents responsible for moving tectonic plates occur in which earth layer?

Answer 1

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.

Answer 2

The convection currents responsible for moving tectonic plates occur in the Mantle layer of the Earth.

Further Explanations:

Mantle is a layer of the Earth that is bounded by crust on the top and core from the bottom. Mantle is generally made up of rocks and is a massive layer of planetary body characterized by different densities. All the planets, asteroids and planetary moon comprises of mantle.

The Earth's mantle is a silicate rock layer with a thickness of about 2,900 Km which in term is 84% of the earth's volume. It is solid in-state but in geological times it was supposed to be a viscous fluid. Its partial melting led to the evolution of Oceanic crust and other partial melting led to the evolution of continental crust.

The mantle is also characterized by the convection current that carries heat from the mantle to the planet's surface. These currents led to the accumulation of mantle on the planets crust that get added to the edges of the plate associated with the seafloor.

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Answer Details-

Grade: High School

Subject: Geography

Chapter:Convention current

Keywords:Mantle, planetary body, densities, planets, asteroids, planetary moon, silicate rock, viscous fluid, Oceanic crust, continental crust.