Across
1
Large natural stream of water
3
Low-lying land surrounded by higher ground
4
Region surrounding the North Pole
5
Distance north or south of equator
6
Long-term weather patterns of an area
8
Mountain that can erupt with lava
Down
2
Dry land with little rainfall
3
Line dividing two countries
7
Deep narrow valley with steep sides
9
Distance east or west of prime meridian