Across
1
Where river meets the sea
6
Imaginary line around the middle of Earth
7
Tool for finding directions
8
Area where water covers the soil
9
Large natural elevation of earth
10
Chain or group of islands
11
Large area covered with trees
Down
2
Largest river in South America
3
Distance north or south of equator
4
Flat grassland in tropical regions
5
Line dividing two countries
12
Raised area of land, smaller than a mountain