Across
1
Low-lying land surrounded by higher ground
4
Largest hot desert in the world
6
Distance east or west of prime meridian
9
Tool for finding directions
10
Body of water surrounded by land
11
Total number of people in an area
Down
2
Large natural stream of water
3
Largest river in South America
5
Piece of land jutting into the sea
7
Flat elevated area of land
8
Height above sea level