Across
1
Imaginary line around the middle of Earth
2
Piece of land jutting into the sea
4
Largest river in South America
5
Flat elevated area of land
9
Wearing away of land by water or wind
10
Dry land with little rainfall
11
Land surrounded by water on three sides
Down
2
Long-term weather patterns of an area
3
Region near the equator
6
Total number of people in an area
7
Low-lying land surrounded by higher ground
8
Cold treeless Arctic plain