Internal Structure of the Earth

2. Is typically a low-lying triangular located area located at the mouth of rivers where it meets an ocean.
4. Is a deep ravine between cliffs that is often carved from the landscape by a river, wind, or glacier.
5. A volcanic mountain's opening at the top.
6. Are flat and broad land areas that have no great changes in elevation when measured with reference to the mean sea level.
7. Is the outermost layer of the Earth.
10. Is a bend in a sinuous watercourse of river.
12. Is the study of the current terrain features of a region and the graphic representation of a landform on a map.
13. Is a predominantly silt-sized sediment formed by the accumulation of windblown dust.
15. Is a low-lying area of land situated between hills or mountains.
17. Are landforms that are controlled by geological processes that form them and continually act on them after their formation.
20. Is a piece of land that projects into a body of water and is connected to the mainland by an isthmus.

1. Is caused by the immense pressure that crystallized the superhot iron into a solid ball.
3. Are defined as the natural physical features on the surface of Earth.
8. The study of the flow of matter primarily in the liquid state under conditions at which they respond with plastic flow.
9. Are elevated areas of land with a flat top and sides that are usually steep cliffs.
11. Is the last and the innermost layer of the Earth.
14. Are formed in high mountains.
16. Are portion of lands elevated thousands of feet above their surroundings.
18. Are mounds or small hills made up of sand.
19. Are usually covered with grass and are used as grazing lands for goats and cattle.