Across
1
Chain or group of islands
7
Distance north or south of equator
10
Total number of people in an area
11
Imaginary line around the middle of Earth
Down
2
Large natural stream of water
3
Flat grassland in tropical regions
4
Steep rock face at edge of land
5
Wearing away of land by water or wind
6
Mountain that can erupt with lava
8
Region surrounding the North Pole
9
Large area covered with trees