In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Q: The name is because radioactive material " falls out " of the atmosphere into which it is spread during the explosion .

A: Nuclear fallout , or fallout , is the residual radioactive material propelled into the upper atmosphere following a nuclear blast , so called because it " falls out " of the sky after the explosion and the shock wave have passed .
****
Q: The Sierra newt is a subspecies of the California newt .

A: The Sierra newt was formerly regarded as a subspecies ( " Taricha torosa sierrae " ) of the California newt ( " Taricha torosa " ) .
****
Q: A head teacher ( also called a school principal , or headmaster / headmistress ) is the teacher in charge of a school .

A:
A head teacher , headmaster , headmistress , head , chancellor , principal or school director ( sometimes another title is used ) is the staff member of a school with the greatest responsibility for the management of the school .
****
