The nasty fine ash is the smallest of the particles produced in a volcanic eruption. It can kill you if you breathe it in:)
The right answer is have a frank, open discussion with him about his feelings.
The combination of a depressive disorder with a serious physical illness such as cancer can make the identification and treatment of depression more difficult. Indeed, the symptoms of depression may be underestimated and attributed to the other disease.
The object's mass. Weight would be how gravity affected it, size is how large it is, density is how tightly the molecules are to each other. Mass is how much matter is in the object.
