AP BIOLOGY

Detailed explanation-1: -When volcanoes erupt they can spew hot, dangerous gases, ash, lava and rock that can cause disastrous loss of life and property, especially in heavily populated areas.

Detailed explanation-2: -Volcanic eruptions produce three types of materials: gas, lava, and fragmented debris called tephra.

Detailed explanation-3: -Some volcanic eruptions are violent, spewing molten rock and gases into the air, while other volcanic eruptions are less explosive but equally damaging, because lava flows out of the volcano and spreads over large distances.

Detailed explanation-4: -The principal products of volcanic eruptions may be grouped into several broad categories according to the type of material ejected and its mode of transport from the vents to its place of deposition: ash, falls, pyroclastics flows, lava flow and gas emission.