1. Which term best describes the process of rock being gradually worn away by natural forces like wind and water?
- A. Sedimentation
- B. Erosion
- C. Compaction
- D. Metamorphism
2. A new highway is cut through a hillside, exposing fresh rock surfaces with sharp edges. What would you predict will happen to this new rock face over many decades of weather?
- A. The rock face will remain perfectly unchanged.
- B. Its sharp edges will be gradually smoothed and worn down.
- C. New, larger rock crystals will grow on the surface.
- D. The rock will become much harder and more resistant to change.
3. What is the primary reason that small, daily events like wind and rain can create massive landforms such as deep canyons?
- A. The chemical composition of rainwater is extremely corrosive and dissolves rock instantly.
- B. These forces only act during major storms, which have enough power to break rocks apart.
- C. The small, almost invisible changes from these forces accumulate over vast periods of time.
- D. Wind and rain cause rocks to heat up and cool down rapidly, causing them to crack.
4. A scientist observes a river that has deepened its channel by a few centimeters over 50 years. This observation is a small-scale example of how...
- A. rivers can create canyons over geological time.
- B. earthquakes can change the course of a river.
- C. volcanic activity builds up new landforms.
- D. rocks can form from compressed sediment.
5. Why don't we notice a mountain getting shorter from wind erosion during our lifetime?
- A. Erosion only happens during the winter.
- B. The changes are microscopic and require immense time periods to become noticeable.
- C. Mountains are constantly growing taller, which cancels out the effects of erosion.
- D. Human eyes are not capable of detecting changes in the shape of large rocks.
6. What is the geological process defined by the wearing away of rock and the transport of the resulting particles by natural forces?
- A. Deposition
- B. Erosion
- C. Compaction
- D. Metamorphism
7. Which of the following is identified as the single most powerful agent of erosion, capable of carving canyons and shaping coastlines?
- A. High-velocity wind
- B. The freezing and thawing of water
- C. Moving water in rivers and waves
- D. Sunlight causing thermal expansion
8. A massive glacier slowly moves down a mountain, scraping the valley floor and carrying large rocks with it. This process is a direct example of what?
- A. Chemical weathering by acid rain
- B. Sediment deposition by wind
- C. Physical erosion by ice
- D. Rock formation from volcanic ash
9. In a desert environment, features like sand dunes and rocks carved into unusual shapes are common. Which agent of erosion is most responsible for creating these landforms?
- A. Glacial ice
- B. River currents
- C. Ocean waves
- D. Wind
10. All of the following are direct examples of erosion EXCEPT:
- A. A river carrying silt downstream.
- B. A glacier scraping rocks from a mountainside.
- C. Magma cooling to form igneous rock.
- D. Wind blowing sand across a desert.