Across
1
Large natural stream of water
2
Low-lying land surrounded by higher ground
4
Chain or group of islands
8
Cold treeless Arctic plain
10
Area where water covers the soil
Down
2
Line dividing two countries
3
Goods sold to another country
5
Vast body of salt water
6
Flat elevated area of land
7
Steep rock face at edge of land
9
Large natural elevation of earth