Across
1
Ocean between Americas and Europe/Africa
4
Imaginary line around the middle of Earth
6
Flat grassland in tropical regions
8
Steep rock face at edge of land
9
Line dividing two countries
Down
2
Area where water covers the soil
3
Seasonal heavy rainfall
5
Mountain that can erupt with lava
7
Large natural stream of water
10
Wearing away of land by water or wind