Across
1
Raised area of land, smaller than a mountain
3
Half of the Earth
6
Cold treeless Arctic plain
7
Seasonal heavy rainfall
8
Vast body of salt water
10
Large natural stream of water
11
Land surrounded by water
Down
2
Largest ocean on Earth
4
Area where water covers the soil
5
Large area covered with trees
9
Body of water surrounded by land
12
Imaginary line around the middle of Earth