How is lava formed?

Answer 1

Lava is magma that has reached the surface.

Magma can be formed from the subduction and melting of cold, dense, wet oceanic crust at some convergent plate margins. The moisture in the rock assists in the melting of the crust and the rock surrounding it. Magma is also formed at hot spots in the mantle where hot material undergoes decompression melting as it rises. Decompression melting also occurs at the mid-ocean ridges where new oceanic crust is formed from rising mantle rock.

Answer 2

Lava froms by the rocks. Sedimentary rocks compress and become metamorphic rocks. when these rocks get deep down into the Earth they start melting and become MAGMA not lava. Lava is when magma comes out of the earth.

Answer 3

Lava is formed when magma, which is molten rock from beneath the Earth's surface, reaches the surface through volcanic activity. The high temperature and pressure cause the magma to melt and flow as lava.

Answer 4

Magma on the earth surface is called lava.Magma is mixture of molten rocks and other solid particles. The liquid underground is called magma and on the earth surface is called lava.

Answer 5

Extrusive igneous rock. Obsidian and basalt are examples of extrusive igneous rocks formed from the solidification of lava.

Answer 6

It solidifies into extrusive igneous rock.

Answer 7

rock melts in a volcano and turns into magma, its not lava until its out of the volcano.

Answer 8

Lava is formed by molten rocks beneath the earths crust, which results into deposit of magmatic substances that when put under pressure is forced to erupt unto the earths surface.