What are the lumps of molten rock thrown out of a volcano called?

These are known as tephra, pyroclats or more generally as volcanic bombs.

Lava Bombs, when a volcano erupts it throws out lava bombs.

Answerair masses develop near the equator are warm; tropical air mass

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!