2007-01-16 22:17:43 · 3 answers · asked by gorgeous.pink 1 in Science & Mathematics ➔ Earth Sciences & Geology
Because it is not a liquid (ie its a solid for the most part) and yet it has the ability to convect (ie it moves)
2007-01-16 23:09:03 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The mantel is divided into two regions, the upper and lower sections. Directly below the upper section is the asthenosphere. Heat and pressure cause a small amount of melting to occur in the asthenosphere.While still solid, the asthenosphere is able to flow. The ability of a solid to flow is called plasticity. When the material in the asthenosphere is heated, it becomes less dense and rises. While the cooler material is more dense tends to sink. Circulating currents carry the warmer material up and the cooler material down. These circular currents in the asthenosphere are called convection currents.
2007-01-17 07:42:14 · answer #2 · answered by Answergirl 5 · 0⤊ 0⤋
Because it is semi solid.
2007-01-17 06:54:11 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋