Across
1
Height above sea level
2
Raised area of land, smaller than a mountain
5
Chain or group of islands
6
Cold treeless Arctic plain
7
Body of water surrounded by land
9
Largest river in South America
11
Region near the equator
Down
2
Half of the Earth
3
Vast body of salt water
4
Landform where river meets the sea
8
Flat elevated area of land
10
Distance east or west of prime meridian