Across
1
Largest ocean on Earth
4
Largest river in South America
5
Region near the equator
8
Flat elevated area of land
10
Deep narrow valley with steep sides
11
Raised area of land, smaller than a mountain
12
Large body of water partly enclosed by land
Down
2
Vast body of salt water
3
Low-lying land surrounded by higher ground
6
Distance north or south of equator
7
Large slow-moving mass of ice
9
Cold treeless Arctic plain