Across
1
Flat grassland in tropical regions
4
Raised area of land, smaller than a mountain
8
Distance east or west of prime meridian
9
Mountain that can erupt with lava
10
Half of the Earth
11
Height above sea level
13
City that is seat of government
14
Where river meets the sea
Down
2
Tool for finding directions
3
Low area between mountains
5
Chain or group of islands
6
Cold treeless Arctic plain
7
Wearing away of land by water or wind
12
Dry land with little rainfall
15
Region near the equator