Across
1
Deep narrow valley with steep sides
4
Where river meets the sea
5
Visual representation of an area
7
Ridge of rock or coral near the surface
8
Total number of people in an area
10
Landform where river meets the sea
11
Wearing away of land by water or wind
Down
2
Imaginary line around the middle of Earth
3
Largest river in South America
6
Region near the equator
9
Distance east or west of prime meridian