Across
1
Distance east or west of prime meridian
2
Region surrounding the North Pole
6
Deep narrow valley with steep sides
8
Flat grassland in tropical regions
9
Raised area of land, smaller than a mountain
10
Line dividing two countries
11
Cold treeless Arctic plain
12
Where river meets the sea
13
Body of water surrounded by land
Down
2
Chain or group of islands
3
Goods brought in from another country
4
Land surrounded by water
5
Large area covered with trees
7
Wearing away of land by water or wind