GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Tectonic plates move because of ____
A
convection currents
B
lava
C
the weight of buildings and people
D
weather
Explanation: 

Detailed explanation-1: -These plates move due to convection currents in the mantle . Heat from the core makes magma in the mantle rise towards the crust. As the hot current nears the crust, it begins to cool and sink back towards the core. As the magma sinks, it drags the plates across the surface of the Earth.

Detailed explanation-2: -Convection currents drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle. In places where convection currents rise up towards the crust’s surface, tectonic plates move away from each other in a process known as seafloor spreading (Fig.

Detailed explanation-3: -While the plates are floating, the convection currents within the mantle are constantly moving in a cycle. This occurs because the hot liquid rock within the mantle rises from deep within the Earth to the top of the mantle. As liquid rock cools, it goes downward.

Detailed explanation-4: -The plates move on a hot flowing mantle layer called the asthenosphere, which is several hundred kilometers thick. Heat within the asthenosphere creates convection currents (similar to the currents that can be seen in the lava lamp).

Detailed explanation-5: -The common, simplified explanation for why tectonic plates are moving is that they’re carried along on currents in the upper mantle, the slowly flowing layer of rock just below the Earth’s crust. Converging currents drive plates into each other. Diverging currents pull them apart. This is mostly true.

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