Across
1
Narrow sea inlet between cliffs
3
Tool for finding directions
4
Land surrounded by water on three sides
6
Imaginary line around the middle of Earth
10
Cold treeless Arctic plain
11
Flat elevated area of land
12
Wearing away of land by water or wind
Down
2
Large slow-moving mass of ice
5
Flat grassland in tropical regions
7
Mountain that can erupt with lava
8
Ridge of rock or coral near the surface
9
Region near the equator