Across
1
Where river meets the sea
5
Largest river in South America
6
Ridge of rock or coral near the surface
7
Largest hot desert in the world
9
Half of the Earth
11
Distance east or west of prime meridian
Down
2
Body of water surrounded by land
3
Wearing away of land by water or wind
4
Imaginary line around the middle of Earth
8
Landform where river meets the sea
10
Line dividing two countries
12
City that is seat of government