Across
1
Cold treeless Arctic plain
5
Flat grassland in tropical regions
6
Piece of land jutting into the sea
7
Region between the two tropic lines
8
Imaginary line around the middle of Earth
9
Ridge of rock or coral near the surface
11
Chain or group of islands
Down
2
Height above sea level
3
Distance north or south of equator
4
Low area between mountains
10
Goods brought in from another country
12
Where river meets the sea
13
Largest ocean on Earth
14
Large natural stream of water
15
Body of water surrounded by land