Across
1
Largest river in South America
3
Half of the Earth
6
Goods brought in from another country
8
Goods sold to another country
9
Mountain that can erupt with lava
10
Cold treeless Arctic plain
11
Height above sea level
12
Large body of water partly enclosed by land
Down
2
Area where water covers the soil
4
Long-term weather patterns of an area
5
One of seven major landmasses
7
Imaginary line around the middle of Earth
13
Low-lying land surrounded by higher ground