Across
1
Ridge of rock or coral near the surface
4
Land surrounded by water
5
Line dividing two countries
6
Total number of people in an area
7
Largest river in South America
10
Flat elevated area of land
13
Half of the Earth
Down
2
Distance east or west of prime meridian
3
Imaginary line around the middle of Earth
8
Low area between mountains
9
Seasonal heavy rainfall
11
Visual representation of an area
12
Ocean between Americas and Europe/Africa