Across
1
Mountain that can erupt with lava
4
Piece of land jutting into the sea
6
Ridge of rock or coral near the surface
7
Wearing away of land by water or wind
8
Line dividing two countries
11
Largest ocean on Earth
Down
2
Land surrounded by water
3
Imaginary line around the middle of Earth
4
Deep narrow valley with steep sides
5
Region near the equator
9
Region surrounding the North Pole
10
Where river meets the sea
12
Dry land with little rainfall