Across
1
Flat grassland in tropical regions
3
Raised area of land, smaller than a mountain
5
Goods sold to another country
6
Largest ocean on Earth
7
Large body of water partly enclosed by land
9
Region surrounding the North Pole
10
Area where water covers the soil
11
Low area between mountains
12
Wearing away of land by water or wind
Down
2
Height above sea level
4
Large slow-moving mass of ice
6
Flat elevated area of land
8
Distance east or west of prime meridian