Across
1
Large natural stream of water
3
Steep rock face at edge of land
4
Largest river in South America
5
Large natural elevation of earth
7
Mountain that can erupt with lava
8
Dry land with little rainfall
12
Flat grassland in tropical regions
Down
2
Region between the two tropic lines
4
Chain or group of islands
6
Cold treeless Arctic plain
9
Distance north or south of equator
10
Physical features of land
11
Area where water covers the soil