Across
1
Large natural stream of water
3
Deep narrow valley with steep sides
4
Raised area of land, smaller than a mountain
5
Distance east or west of prime meridian
8
Distance north or south of equator
11
Steep rock face at edge of land
12
Chain or group of islands
Down
2
Large slow-moving mass of ice
6
Large body of water partly enclosed by land
7
Piece of land jutting into the sea
9
Cold treeless Arctic plain
10
Where river meets the sea
13
Low-lying land surrounded by higher ground
14
Dry land with little rainfall
15
Half of the Earth