Across
1
Steep rock face at edge of land
3
Distance north or south of equator
4
Distance east or west of prime meridian
6
Largest river in South America
9
Cold treeless Arctic plain
Down
1
Deep narrow valley with steep sides
2
Large slow-moving mass of ice
5
Region surrounding the North Pole
7
Imaginary line around the middle of Earth
8
Half of the Earth