Which term is associated with the lava that has erupted from a volcanic vent?

Lava is defined as the molten rock that has erupted onto the Earth's surface through a volcanic vent. Before it erupts, this molten rock is referred to as magma, which is found beneath the Earth's crust. Once it breaks through the surface, it is called lava. This terminology is crucial in understanding volcanic processes and the lifecycle of magma as it becomes lava during an eruption.

The other terms do not accurately describe the material that has erupted from a volcanic vent. Gas refers to the vapor and gases that can be released during an eruption but does not represent the solid or molten rock itself. Bedrock refers to the solid rock that lies beneath the surface soil or loose material, which is unrelated to the eruptive process. Rockflow, although it suggests a movement of rocks, is not a commonly recognized term in geology for describing erupted lava.