Across
1
Large slow-moving mass of ice
3
Mountain that can erupt with lava
4
Low-lying land surrounded by higher ground
6
Region between the two tropic lines
10
Low area between mountains
12
Half of the Earth
Down
2
Largest hot desert in the world
4
Line dividing two countries
5
Tool for finding directions
7
Chain or group of islands
8
Narrow sea inlet between cliffs
9
Distance north or south of equator
11
One of seven major landmasses