Across
1
Imaginary line around the middle of Earth
3
Land surrounded by water on three sides
4
Flat grassland in tropical regions
6
Region near the equator
7
Where river meets the sea
9
Mountain that can erupt with lava
10
Large natural elevation of earth
Down
2
Landform where river meets the sea
3
Flat elevated area of land
5
Chain or group of islands
8
Largest river in South America