World Book Student

Glacier
Glacier is a large mass of ice that flows slowly under the influence of gravity.

Geographic information system (GIS)
Geographic information system (GIS) is a computerized system for storing, organizing, and analyzing geographical information.

Geomorphology
Geomorphology is the study of the earth's surface and the changes that occur there.

Sonoran Desert
Sonoran Desert is the largest desert in North America.

Hill
Hill is an elevation of the ground that has a distinct summit.

Tundra
Tundra is a term most often used for the cold, dry, treeless lands of the Arctic.

Sarawak
Sarawak (pop. 2,009,893) is the largest state in Malaysia.

Geography
Geography is the study of the location and distribution of living things and the earth features among which they live.

Antarctica
Antarctica is the ice-buried continent that covers and surrounds the South Pole.

Desert
Desert is a barren region of Earth's surface that receives little rainfall.

Moon
Moon is Earth's only natural satellite and the only astronomical body other than Earth ever visited by human beings.

Alps
Alps are the largest mountain system in Europe.

Australian Aborigines
Australian Aborigines are the first people of Australia.

Climate
Climate is the weather of a place averaged over a length of time.

Indian, American
The people now known as Indians or Native Americans were the first people to live in the Americas.