Twenty Questions

Erosion and Deposition

Twenty Questions

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1. What do contour lines that are close together mean?

The slope of the land in that area is steep.

2. What is the change/difference in elevation between adjacent (neighboring) contour lines?

Contour interval

3. What do we call areas that have landforms that have not changed much over time?

Stable areas

4. How is a delta built?

Sediments are carried downhill by a flowing river are dropped at the mouth of the river where they pile up and create new land.

5. What is weathering?

Weathering is the earth process that breaks rocks into smaller pieces called sediments.

6. What is erosion?

Erosion is the movement of sediments from one place to another by water, wind, or ice?

7. What is deposition?

Deposition is when the sediments are left.

8. Is soil that is loose or compact more likely to erode?

Soil that is loose is more likely to erode.

9. Why do you think granite on a mountaintop likely erode differently than granite found on a sea cliff?

Granite on a mountaintop will erode due to rain, while granite on a cliff will erode from waves. It is likely that the cliff will erode faster because the ocean’s waves are more powerful and cause more erosion.

10. How can construction and farming affect the land?

Increases erosion Makes land unstable

11. What landform is formed when the constructive force of deposition is greater than the destructive force of erosion?

Delta

12. What landform is formed when the destructive force of erosion is greater than the force of deposition?

Cliff

13. What landform is created when there is a balance with the constructive force of deposition and the destructive force of erosion?

Beach

14. What is one of the two mitigation methods we learned that reduces deposition?

Dredging or jetty

15. What is one of the two mitigation methods we learned that reduces erosion?

Breakwater or seawall (or riprap)

16. What is a stream of water in the ocean that runs parallel to the shore and moves across the face of the beach?

longshore current

17. Which earth process typically follows weathering?

erosion

18. Which earth process typically follows erosion?

deposition

19. At which landform in Boomtown would you expect to find the most fertile soil?

Delta Marsh

20. Name a landform that is produced from erosion.

Canyon Caves Channel Valley Hilltop