Across
1
Goods brought in from another country
4
Cold treeless Arctic plain
6
Vast body of salt water
9
Mountain that can erupt with lava
10
Seasonal heavy rainfall
11
Flat grassland in tropical regions
Down
2
Low-lying land surrounded by higher ground
3
Dry land with little rainfall
5
Region near the equator
7
Distance north or south of equator
8
Deep narrow valley with steep sides