Across
1
Low-lying land surrounded by higher ground
4
Cold treeless Arctic plain
5
Ocean between Americas and Europe/Africa
6
Imaginary line around the middle of Earth
7
Visual representation of an area
11
Area where water covers the soil
Down
1
Line dividing two countries
2
Large area covered with trees
3
Total number of people in an area
8
Distance east or west of prime meridian
9
Deep narrow valley with steep sides
10
Large slow-moving mass of ice
12
Physical features of land