The salty water that covers a large part of the surface of the earth, or a large area of salty water, smaller than an ocean, that is partly or completely surrounded by land
A sea
15
A mountain with a large, circular hole at the top through which lava (= hot liquid rock) gases, steam, and dust are or have been forced
Volcano
15
An area, often covered with sand or rocks, where there is very little rain and not many plants
Desert
15
A sudden movement , shaking of the earth's surface, sometimes causing great damage.