Across
1
Piece of land jutting into the sea
3
Half of the Earth
4
Distance east or west of prime meridian
9
Total number of people in an area
11
Height above sea level
12
Large area covered with trees
Down
1
Deep narrow valley with steep sides
2
Line dividing two countries
5
Imaginary line around the middle of Earth
6
Flat elevated area of land
7
Cold treeless Arctic plain
8
Land surrounded by water
10
Region between the two tropic lines