Across
1
Steep rock face at edge of land
3
Largest river in South America
8
Dry land with little rainfall
9
Imaginary line around the middle of Earth
10
Large slow-moving mass of ice
11
Vast body of salt water
Down
2
Low-lying land surrounded by higher ground
4
Distance east or west of prime meridian
5
Large area covered with trees
6
Largest ocean on Earth
7
Flat grassland in tropical regions