Across
1
Ridge of rock or coral near the surface
3
Land surrounded by water
6
Imaginary line around the middle of Earth
7
Half of the Earth
9
Mountain that can erupt with lava
10
Region near the equator
Down
2
Flat elevated area of land
4
Low-lying land surrounded by higher ground
5
Flat grassland in tropical regions
8
Distance east or west of prime meridian