Across
1
Half of the Earth
6
Region surrounding the North Pole
8
Largest river in South America
9
Flat grassland in tropical regions
11
Ridge of rock or coral near the surface
Down
2
Largest ocean on Earth
3
Body of water surrounded by land
4
Distance east or west of prime meridian
5
One of seven major landmasses
7
Large natural stream of water
10
Mountain that can erupt with lava