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 out
a volcano
10
a sudden violent movement of the earth's surface, sometimes causing great damage
an earthquake
20
an area, often covered with sand or rocks, where there is very little rain and not many plants
a desert
25
a raised part of the earth's surface, much larger than a hill, the top of which might be covered in snow
a mountain
15
a natural wide flow of fresh water across the land into the sea, a lake
a river
15
an area of land that is higher than the surrounding land
a hill
10
a large area of land covered with trees and plants, usually larger than a wood, or the trees and plants themselves
a forest
15
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
5
a large area of water surrounded by land and not connected to the sea except by rivers or streams
a lake
20
an area of low land between hills or mountains, often with a river running through it
a valley
25
an area of land, used for growing crops or keeping animals, usually surrounded by a fence
