World Geography. Ch.18 the Arabian Peninsula,Iraq,and Iran

Arabian Peninsula
contains the world's largest sand desert covered with rock and gravel.
Persian Gulf
a body of water between the Arabian Peninsula and the Zagros Mountains, in Iran.
Tigres and Europhrates Rivers
flow across a low, flat plain in Iraq.
means land between the rivers.
Peninsula's desert plains
covered withsand in the sand in the south and vocanic rock in the north.