Across
1
Half of the Earth
2
Deep narrow valley with steep sides
5
Land surrounded by water
6
Where river meets the sea
7
Large natural elevation of earth
12
Land surrounded by water on three sides
13
Landform where river meets the sea
Down
2
One of seven major landmasses
3
Large area covered with trees
4
Cold treeless Arctic plain
8
Flat elevated area of land
9
Region near the equator
10
Distance east or west of prime meridian
11
Largest river in South America