It's an area of sand or rocks where there is very little rain and not many plants.
desert
It is a very large area of sea.
ocean
It is a place where people live and work. There are many different houses and some shops.
town
A piece of land in an ocean or sea.
island
It is a forest in a tropical area. A lot of rain falls there.
rainforest
It is the lowest part of an ocean, for example.
bottom
It is a city which is the center of government for a country.
capital city
It's a place in a desert where there is water, some plants and trees and sometimes a village or town.
oasis
It's a mountain with a large, circular hole at the top. There is hot liquid rock inside.
volcano
It is a large hole in a hill, cliff, or mountain, or one that is underground.
cave
It is a place where people live. There are some houses. It's smaller than a town.
village