Across
1
Flat grassland in tropical regions
4
Large natural stream of water
6
Ocean between Americas and Europe/Africa
7
Distance north or south of equator
8
Cold treeless Arctic plain
Down
2
Body of water surrounded by land
3
Largest ocean on Earth
5
Landform where river meets the sea
9
Large natural elevation of earth
10
Imaginary line around the middle of Earth
11
Largest river in South America
12
Total number of people in an area