Weathering and Erosion Quiz

What is the primary difference between weathering and erosion?

• Weathering involves the breakdown of rock, while erosion involves the transportation of the resulting sediment.

• Weathering only affects organic material, while erosion affects inorganic material.

• Weathering is caused by gravity, while erosion is caused by water, wind, or ice.

• Weathering is a rapid process, while erosion is a slow process.

Which of the following is an example of physical weathering?

• Rusting of a mineral that contains iron.

• The expansion of water freezing in cracks, causing a rock to break.

• The breakdown of limestone by acid rain.

• The formation of caves as groundwater dissolves rock.

What is the primary agent of erosion in the formation of a river valley?

• Ice

• Running water

• Gravity

• Wind

Mass wasting is the downslope movement of rock, soil, and sediment primarily driven by:

• Gravitational force

• Solar energy

• Volcanic activity

• Plate tectonics

Which of the following describes the mass wasting process known as 'creep'?

• A fast-moving, water-saturated flow of fine-grained sediment.

• The slow, imperceptible movement of soil and loose rock downhill.

• The rapid free-fall of a single rock from a steep cliff.

• The rotational slide of a cohesive block of material along a curved surface.

The process by which sediment settles and is added to a landform after being transported is called:

• Sedimentation

• Lithification

• Erosion

• Weathering

How does the removal of vegetation, such as through deforestation, affect the risk of mass wasting?

• It increases the risk by exposing the soil to more sunlight, which weakens it.

• It has no significant effect on the stability of a slope.

• It decreases the risk by reducing the overall weight on the slope.

• It increases the risk because plant roots no longer hold the soil in place.

What is a major characteristic of chemical weathering?

• It is a faster process than physical weathering.

• It only occurs in cold, dry climates.

• It always involves the physical removal of rock particles.

• It changes the chemical composition of the rock.

Which of the following is the final step in the formation of a sedimentary rock?

• Weathering and breakdown of pre-existing rock.

• Erosion and transportation of weathered material.

• Compaction and cementation of deposited sediment.

• Deposition of sediment in a low-lying area.

A mudflow is a type of mass wasting that can be best described as:

• A fast-moving flow of water-saturated sediment and debris.

• A rock mass that breaks away and slides along a planar surface.

• A dry, slow-moving pile of rock debris.

• The rotational movement of a large, cohesive block of soil.