Across
1
Large area covered with trees
4
Ridge of rock or coral near the surface
5
Largest river in South America
6
Chain or group of islands
7
Cold treeless Arctic plain
9
Region surrounding the North Pole
10
Flat elevated area of land
Down
2
Half of the Earth
3
Large body of water partly enclosed by land
5
Ocean between Americas and Europe/Africa
8
Line dividing two countries
11
Seasonal heavy rainfall
12
Flat grassland in tropical regions