Across
1
Low-lying land surrounded by higher ground
4
Goods sold to another country
7
Total number of people in an area
8
Steep rock face at edge of land
9
Piece of land jutting into the sea
10
Distance north or south of equator
13
Goods brought in from another country
Down
2
Imaginary line around the middle of Earth
3
Mountain that can erupt with lava
5
Chain or group of islands
6
Cold treeless Arctic plain
11
Height above sea level
12
One of seven major landmasses