Across
1
Vast body of salt water
4
Deep narrow valley with steep sides
5
Body of water surrounded by land
7
Piece of land jutting into the sea
9
Largest river in South America
10
Low-lying land surrounded by higher ground
11
Distance east or west of prime meridian
Down
2
Large area covered with trees
3
Largest hot desert in the world
6
Imaginary line around the middle of Earth
8
Large slow-moving mass of ice