Across
1
Low-lying land surrounded by higher ground
3
Imaginary line around the middle of Earth
4
Mountain that can erupt with lava
7
Goods sold to another country
9
Land surrounded by water
10
Largest hot desert in the world
Down
2
Flat grassland in tropical regions
5
Large area covered with trees
6
Tool for finding directions
8
Distance north or south of equator
11
Low area between mountains