Across
1
Long-term weather patterns of an area
4
Deep narrow valley with steep sides
6
Flat elevated area of land
7
Large slow-moving mass of ice
10
Wearing away of land by water or wind
Down
1
Tool for finding directions
2
Largest river in South America
3
Cold treeless Arctic plain
5
Total number of people in an area
8
Large body of water partly enclosed by land
9
Imaginary line around the middle of Earth
11
Distance east or west of prime meridian
12
Dry land with little rainfall
13
Ocean between Americas and Europe/Africa