Across
1
Total number of people in an area
5
Region near the equator
7
Steep rock face at edge of land
8
Seasonal heavy rainfall
9
Deep narrow valley with steep sides
10
Distance north or south of equator
11
Cold treeless Arctic plain
12
Mountain that can erupt with lava
Down
1
Largest ocean on Earth
2
Chain or group of islands
3
Low-lying land surrounded by higher ground
4
Raised area of land, smaller than a mountain
6
Flat elevated area of land
8
Large natural elevation of earth