Across
1
Piece of land jutting into the sea
2
Region between the two tropic lines
3
Low-lying land surrounded by higher ground
5
Large natural elevation of earth
7
Mountain that can erupt with lava
9
Raised area of land, smaller than a mountain
Down
1
Deep narrow valley with steep sides
2
Cold treeless Arctic plain
4
Large natural stream of water
6
Large slow-moving mass of ice
8
Imaginary line around the middle of Earth
10
Largest hot desert in the world
11
Largest river in South America
12
Wearing away of land by water or wind