Across
1
Land surrounded by water on three sides
4
Large natural stream of water
7
Deep narrow valley with steep sides
8
Line dividing two countries
9
Large natural elevation of earth
10
Piece of land jutting into the sea
11
Chain or group of islands
12
Distance north or south of equator
Down
2
Distance east or west of prime meridian
3
Half of the Earth
5
Visual representation of an area
6
Region between the two tropic lines
13
Largest river in South America