Lava and other materials that are launched from a volcano into the air are referred to as A. tephra. It refers to everything that is propelled or ejected from an active volcano while it is erupting. In Greek, the word tephra means ash, which can be applied here. Magma is hardened lava, and it falls down the volcano, it doesn't flow into the air. Basalt is a rock, and flow again flows down the volcano, similarly to magma.