Across
1
Mountain that can erupt with lava
4
Raised area of land, smaller than a mountain
5
Wearing away of land by water or wind
6
Deep narrow valley with steep sides
8
Where river meets the sea
10
Physical features of land
11
Tool for finding directions
Down
2
Seasonal heavy rainfall
3
Distance north or south of equator
7
Largest river in South America
9
Ridge of rock or coral near the surface
12
Area where water covers the soil