Across
1
Goods sold to another country
2
Piece of land jutting into the sea
4
Imaginary line around the middle of Earth
6
Flat grassland in tropical regions
10
Area where water covers the soil
11
Land surrounded by water
13
Landform where river meets the sea
Down
2
Deep narrow valley with steep sides
3
Vast body of salt water
5
Distance east or west of prime meridian
7
Cold treeless Arctic plain
8
Largest river in South America
9
Largest hot desert in the world
12
Large slow-moving mass of ice