Across
1
Goods sold to another country
4
Deep narrow valley with steep sides
6
Largest river in South America
8
Land surrounded by water
10
Goods brought in from another country
12
Low area between mountains
14
Line dividing two countries
15
Largest hot desert in the world
Down
2
Total number of people in an area
3
Large slow-moving mass of ice
5
Cold treeless Arctic plain
7
Seasonal heavy rainfall
9
Half of the Earth
11
Distance north or south of equator
13
Piece of land jutting into the sea