Across
1
Low area between mountains
4
Line dividing two countries
5
Chain or group of islands
7
Distance north or south of equator
12
Body of water surrounded by land
Down
2
Piece of land jutting into the sea
3
Imaginary line around the middle of Earth
6
Area where water covers the soil
8
Flat grassland in tropical regions
9
Height above sea level
10
Vast body of salt water
11
Cold treeless Arctic plain