Across
1
Largest river in South America
5
Low area between mountains
6
Tool for finding directions
7
Where river meets the sea
9
Distance east or west of prime meridian
12
Steep rock face at edge of land
13
Ridge of rock or coral near the surface
Down
2
One of seven major landmasses
3
City that is seat of government
4
Mountain that can erupt with lava
8
Wearing away of land by water or wind
10
Large body of water partly enclosed by land
11
Large slow-moving mass of ice