earth

Tectonic Plates

Tectonic Plates The Earth’s surface is divided into thick slabs called tectonic plates. Each plate is a fragment of the Earth’s rigid outer layer, or lithosphere.   Tectonic Plates are probably driven by convection currents of molten rock that circulate with the Earth’s mantle. The lithosphere was too thin for tectonic plates until 500 million… read more »

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