Across
1
Low area between mountains
4
Line dividing two countries
5
Wearing away of land by water or wind
6
Large slow-moving mass of ice
7
Imaginary line around the middle of Earth
9
Total number of people in an area
10
Largest ocean on Earth
Down
2
Tool for finding directions
3
Distance east or west of prime meridian
7
Goods sold to another country
8
Narrow sea inlet between cliffs
11
Ridge of rock or coral near the surface
12
Goods brought in from another country