Across
1
Cold treeless Arctic plain
4
Largest ocean on Earth
5
Flat elevated area of land
6
Piece of land jutting into the sea
8
Flat grassland in tropical regions
10
Total number of people in an area
11
Narrow sea inlet between cliffs
Down
2
Tool for finding directions
3
Long-term weather patterns of an area
7
Area where water covers the soil
9
Height above sea level
12
Distance east or west of prime meridian