Across
1
City that is seat of government
5
Height above sea level
6
Low-lying land surrounded by higher ground
7
Vast body of salt water
8
Deep narrow valley with steep sides
12
Low area between mountains
13
Line dividing two countries
Down
2
Total number of people in an area
3
Goods brought in from another country
4
Flat grassland in tropical regions
8
One of seven major landmasses
9
Mountain that can erupt with lava
10
Tool for finding directions
11
Wearing away of land by water or wind