Across
1
Body of water surrounded by land
3
Deep narrow valley with steep sides
4
Flat grassland in tropical regions
5
Region surrounding the North Pole
6
Where river meets the sea
7
Height above sea level
10
Ridge of rock or coral near the surface
Down
1
Distance east or west of prime meridian
2
Line dividing two countries
8
Low area between mountains
9
One of seven major landmasses