Across
1
Wearing away of land by water or wind
6
Mountain that can erupt with lava
7
Landform where river meets the sea
8
Seasonal heavy rainfall
9
Largest river in South America
10
Total number of people in an area
Down
2
Largest ocean on Earth
3
Large natural stream of water
4
Imaginary line around the middle of Earth
5
Low-lying land surrounded by higher ground
8
Large natural elevation of earth