Across
1
Mountain that can erupt with lava
4
Steep rock face at edge of land
5
Ridge of rock or coral near the surface
7
Large natural elevation of earth
9
Cold treeless Arctic plain
11
Total number of people in an area
Down
2
Long-term weather patterns of an area
3
Imaginary line around the middle of Earth
4
Deep narrow valley with steep sides
6
Physical features of land
8
Goods sold to another country
10
Largest river in South America