Weathering and Erosion

What is an example of mechanical weathering?

• Frost wedging is an example of mechanical weathering.

• Chemical dissolution of minerals.

• Soil erosion by water.

• Formation of sedimentary rocks.

What is the role of acid rain in weathering?

• Acid rain can freeze rocks and cause them to crack.

• Acid rain can chemically weather rocks by dissolving minerals and altering their composition.

• Acid rain has no effect on weathering processes.

• Acid rain primarily causes physical weathering by eroding surfaces.

What is mechanical weathering?

• The chemical alteration of rocks due to environmental factors.

• The physical breakdown of rocks into smaller pieces without changing their chemical composition.

• The process of rocks being worn away by wind and water.

• The formation of soil from the decomposition of organic matter.

What is erosion?

• The process by which water, ice, wind, or gravity moves fragments of rock and soil.

• The process of soil formation from organic matter.

• The movement of tectonic plates beneath the Earth's surface.

• The chemical breakdown of rocks due to acid rain.

What is frost wedging?

• A type of mechanical weathering where water seeps into cracks, freezes, and expands, causing the rock to break apart.

• A process where rocks are worn down by wind and rain over time.

• A method of planting trees in cold climates to prevent soil erosion.

• A technique used in construction to freeze soil for stability.

What is the effect of gravity on erosion?

• Gravity causes rocks and soil to move uphill, reducing erosion.

• Gravity has no effect on erosion.

• Gravity can cause rocks and soil to move downhill, contributing to erosion.

• Gravity only affects water erosion, not soil erosion.

What is weathering?

• The process of breaking down rocks into smaller pieces through physical or chemical means.

• The process of forming new rocks from molten lava.

• The movement of rocks and soil due to gravity.

• The process of plants growing on rocks to create soil.

What is the difference between weathering and erosion?

• Weathering breaks down rocks; erosion moves the broken pieces away.

• Weathering is the movement of rocks; erosion is the breaking down of rocks.

• Weathering occurs only in cold climates; erosion occurs in warm climates.

• Weathering is a chemical process; erosion is a physical process.

What is the role of wind in erosion?

• Wind can carry small particles of soil and rock away, leading to erosion.

• Wind has no effect on erosion.

• Wind only affects water erosion, not soil erosion.

• Wind can only erode large boulders.

What is chemical weathering?

• The process that breaks down rocks through chemical reactions, often involving water and acids.

• The physical breakdown of rocks into smaller pieces without changing their composition.

• The process of transporting sediments from one location to another by wind or water.

• The formation of new minerals from existing rocks due to high pressure and temperature.