Across
1
Wearing away of land by water or wind
4
Imaginary line around the middle of Earth
6
Physical features of land
7
Deep narrow valley with steep sides
9
Total number of people in an area
10
Goods sold to another country
11
Large body of water partly enclosed by land
Down
2
Largest hot desert in the world
3
Region surrounding the North Pole
5
Dry land with little rainfall
6
Cold treeless Arctic plain
8
Distance east or west of prime meridian
12
Mountain that can erupt with lava