Across
1
Region between the two tropic lines
4
Raised area of land, smaller than a mountain
5
Half of the Earth
6
Where river meets the sea
10
Deep narrow valley with steep sides
12
Cold treeless Arctic plain
13
Largest hot desert in the world
Down
2
Imaginary line around the middle of Earth
3
Distance north or south of equator
7
Largest ocean on Earth
8
Chain or group of islands
9
Tool for finding directions
11
Ocean between Americas and Europe/Africa