Across
1
Low-lying land surrounded by higher ground
2
Goods sold to another country
3
Low area between mountains
7
Ridge of rock or coral near the surface
8
Mountain that can erupt with lava
Down
2
Where river meets the sea
4
Largest hot desert in the world
5
Area where water covers the soil
6
Flat elevated area of land
9
Long-term weather patterns of an area