The ________________ is a region of hot, slow-flowing, solid rock between the core and the crust.

Earth can be divided into 3 different layers: the crust, the mantle and the core. 

The crust is the outermost covering of our planet and is the region where we live. It has a thickness of 5 km (under oceans) to 60 km (under continents). The mantle is the layer underneath the crust. The mantle is a region of hot, slow-flowing, solid rock between the core and the crust. The mantle has a thickness of about 2,900 km and has a lower temperature near the crust and a higher temperature as one goes towards the core. The core of the planet is about 3,000 km thick. 

The mantle is generally divided into three layers: the upper layer, the transition zone and the lower layer. The upper layer of the mantle, along with the crust, forms the lithosphere of Earth.

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