Across
1
Low-lying land surrounded by higher ground
3
Piece of land jutting into the sea
4
Where river meets the sea
7
Region surrounding the North Pole
8
Deep narrow valley with steep sides
9
Mountain that can erupt with lava
10
Visual representation of an area
Down
2
Largest hot desert in the world
5
Cold treeless Arctic plain
6
Largest river in South America
11
Region near the equator
12
Large natural stream of water
13
Imaginary line around the middle of Earth