Across
1
Line dividing two countries
2
Steep rock face at edge of land
4
Imaginary line around the middle of Earth
5
Cold treeless Arctic plain
Down
2
Deep narrow valley with steep sides
3
Large natural stream of water
6
Largest ocean on Earth
7
Landform where river meets the sea
8
Physical features of land
9
Half of the Earth
10
Ridge of rock or coral near the surface
11
Distance east or west of prime meridian