Across
1
Flat grassland in tropical regions
5
Region surrounding the North Pole
7
Large natural elevation of earth
8
Landform where river meets the sea
11
Chain or group of islands
Down
2
Largest ocean on Earth
3
Flat elevated area of land
4
Height above sea level
6
Total number of people in an area
9
Imaginary line around the middle of Earth
10
Mountain that can erupt with lava