Across
1
Region between the two tropic lines
4
Largest river in South America
5
Region surrounding the North Pole
7
Total number of people in an area
9
Area where water covers the soil
12
Landform where river meets the sea
13
Where river meets the sea
Down
2
Deep narrow valley with steep sides
3
Height above sea level
6
Visual representation of an area
8
Mountain that can erupt with lava
10
Imaginary line around the middle of Earth
11
Region near the equator