Question

What is ash in the volcano eruption?

Answer 1

Volcanic ash is made of tiny fragments of jagged rock,minerals, and volcanic glass. Unlike the soft ash created by burning wood, volcanic ash is hard, abrasive, and does not dissolve in water. Generally, particles of volcanic ash are 2 millimeters (.08 inches) across or smaller.  Coarse particles of volcanic ash look and feel like grains of sand, while very fine particles are powdery. Particles are sometimes called tephra—which actually refers to all solid material ejected by volcanoes. Ash is a product of explosive volcanic eruptions. When gases inside a volcano's magma chamber expand, they violently push molten rock (magma) up and out of thevolcano. 

Answer 2

Explanation:

Volcanic ash is not the product of combustion, like the soft fluffy material created by burning wood, leaves, or paper, but rather consists of fragments of rocks, minerals, and volcanic glass ranging in size from sand to clay-like (from 2 mm (1/12 in) to less than 0.004 mm (1/256th in) in diameter).