Across
1
Largest river in South America
4
Region surrounding the North Pole
5
City that is seat of government
6
Cold treeless Arctic plain
7
Line dividing two countries
8
Distance north or south of equator
9
Flat elevated area of land
10
Half of the Earth
Down
2
Imaginary line around the middle of Earth
3
Area where water covers the soil
4
Chain or group of islands