Across
1
Largest hot desert in the world
4
Wearing away of land by water or wind
7
Mountain that can erupt with lava
8
Low-lying land surrounded by higher ground
10
Distance east or west of prime meridian
11
Physical features of land
Down
2
Height above sea level
3
Land surrounded by water
5
Ocean between Americas and Europe/Africa
6
Deep narrow valley with steep sides
9
Chain or group of islands
12
One of seven major landmasses