Magma that is blasted into the air and hardens is called volcanic ash.

Here's why:

* Magma: Molten rock found beneath the Earth's surface.

* Blast: The forceful ejection of material during a volcanic eruption.

* Hardens: The molten rock cools and solidifies in the air.

Volcanic ash is actually made up of tiny fragments of rock, minerals, and glass. It can be very dangerous, causing respiratory problems and damaging infrastructure.