Across
1
Body of water surrounded by land
3
Ridge of rock or coral near the surface
5
Imaginary line around the middle of Earth
6
Vast body of salt water
7
Region between the two tropic lines
8
Distance north or south of equator
Down
2
Half of the Earth
4
Land surrounded by water on three sides
9
Largest river in South America
10
Line dividing two countries