Across
1
Largest river in South America
3
Ridge of rock or coral near the surface
5
One of seven major landmasses
6
Mountain that can erupt with lava
7
Piece of land jutting into the sea
8
Low-lying land surrounded by higher ground
9
Large body of water partly enclosed by land
11
Large slow-moving mass of ice
Down
2
Large area covered with trees
4
Land surrounded by water on three sides
10
Region near the equator