Across
1
Cold treeless Arctic plain
3
Raised area of land, smaller than a mountain
4
Large body of water partly enclosed by land
6
Large slow-moving mass of ice
8
Tool for finding directions
10
Large natural stream of water
11
Imaginary line around the middle of Earth
Down
2
Land surrounded by water
5
Region surrounding the North Pole
7
Region near the equator
9
Chain or group of islands
12
One of seven major landmasses