Across
1
Low-lying land surrounded by higher ground
3
Piece of land jutting into the sea
4
Goods sold to another country
7
Land surrounded by water on three sides
8
Cold treeless Arctic plain
10
Low area between mountains
Down
2
Largest ocean on Earth
3
Long-term weather patterns of an area
5
Flat grassland in tropical regions
6
Imaginary line around the middle of Earth
9
Large natural stream of water
11
Distance north or south of equator