GEOLOGY

Detailed explanation-1: -Much of the planet’s mantle consists of magma. This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth’s surface, it is called lava. Like solid rock, magma is a mixture of minerals.

Detailed explanation-2: -Magma that reaches the Earth’s crust and is thrown out from a volcano is called lava.

Detailed explanation-3: -2. Lava is the eruption or flow of molten material above ground.

Detailed explanation-4: -The manner in which we use the terms magma and lava can be confusing; molten rock is referred to as magma when in the Earth’s crust or mantle; and as lava when exposed on the Earth’s surface.

Detailed explanation-5: -A volcanic bomb or lava bomb is a mass of partially molten rock (tephra) larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption. Because volcanic bombs cool after they leave the volcano, they are extrusive igneous rocks.