Across
1
Ocean between Americas and Europe/Africa
4
Flat grassland in tropical regions
5
Large natural stream of water
7
Body of water surrounded by land
8
Low-lying land surrounded by higher ground
11
Large area covered with trees
13
Long-term weather patterns of an area
Down
1
Region surrounding the North Pole
2
Largest river in South America
3
Wearing away of land by water or wind
6
Total number of people in an area
9
Largest ocean on Earth
10
Raised area of land, smaller than a mountain
12
Low area between mountains