Across
1
Largest river in South America
3
Large natural stream of water
5
One of seven major landmasses
6
Chain or group of islands
7
Total number of people in an area
10
Piece of land jutting into the sea
Down
2
Distance north or south of equator
4
Mountain that can erupt with lava
5
Steep rock face at edge of land
8
Flat grassland in tropical regions
9
Flat elevated area of land
11
Narrow sea inlet between cliffs
12
Line dividing two countries
13
Deep narrow valley with steep sides