Across
1
Raised area of land, smaller than a mountain
3
Deep narrow valley with steep sides
4
Largest ocean on Earth
5
Imaginary line around the middle of Earth
7
Flat elevated area of land
8
Low area between mountains
9
Seasonal heavy rainfall
10
Cold treeless Arctic plain
Down
2
Total number of people in an area
3
Piece of land jutting into the sea
6
Landform where river meets the sea