人o0 1.During the ice ages,human beings exposed to the colder temperatures of the time would often make their homes in caves. be exposed to:be unprotected or unsheltered from (heat,cold,danger, attack,etc.) e.g.Soldiers in an open field are exposed to the enemy's gunfire. Plants exposed to great heat for long perieds of time will die: 1. During the ice ages, human beings exposed to the colder temperatures of the time would often make their homes in caves. be exposed to: be unprotected or unsheltered from (heat, cold, danger, attack, etc.) e.g. Soldiers in an open field are exposed to the enemy’s gunfire. Plants exposed to great heat for long periods of time will die