Across
1
Half of the Earth
4
Low-lying land surrounded by higher ground
6
Deep narrow valley with steep sides
10
Chain or group of islands
11
Region surrounding the North Pole
13
Long-term weather patterns of an area
14
Dry land with little rainfall
Down
2
Where river meets the sea
3
Distance east or west of prime meridian
5
Line dividing two countries
7
Height above sea level
8
Tool for finding directions
9
Largest ocean on Earth
12
Wearing away of land by water or wind
15
Large slow-moving mass of ice