Across
1
Mountain that can erupt with lava
4
Imaginary line around the middle of Earth
5
Deep narrow valley with steep sides
7
Seasonal heavy rainfall
10
Half of the Earth
Down
2
Area where water covers the soil
3
Physical features of land
4
Wearing away of land by water or wind
6
Large body of water partly enclosed by land
8
Large natural stream of water
9
Chain or group of islands
11
Line dividing two countries