Mechanical and chemical weathering

What is the impact of wind on weathering?

• Wind causes chemical weathering by altering the mineral composition of rocks.

• Wind can cause mechanical weathering by carrying sand and other particles that erode rock surfaces through abrasion.

• Wind has no significant impact on weathering processes.

• Wind primarily contributes to the formation of soil rather than weathering.

What causes abrasion in mechanical weathering?

• Friction from wind, water, or ice carrying particles

• Chemical reactions between rocks and water

• Temperature changes causing expansion and contraction

• Biological activity from plant roots

What is the difference between mechanical and chemical weathering?

• Mechanical weathering changes the composition of rocks, while chemical weathering does not.

• Mechanical weathering involves chemical reactions, while chemical weathering does not.

• Mechanical weathering physically breaks rocks into smaller pieces without changing their composition, while chemical weathering alters the minerals in rocks through chemical reactions.

• Mechanical weathering occurs only in wet conditions, while chemical weathering occurs in dry conditions.

What role does temperature play in mechanical weathering?

• Temperature changes have no effect on rocks.

• Temperature changes can cause rocks to expand and contract, leading to stress and eventual cracking.

• Temperature only affects the color of rocks.

• Temperature changes can make rocks more durable.

What is an example of chemical weathering?

• Rusting, where iron in rocks reacts with oxygen and moisture, forming iron oxide.

• Frost wedging, where water freezes in cracks and expands.

• Root growth, where plant roots break apart rocks.

• Wind erosion, where wind removes surface materials.

What is the significance of weathering in the rock cycle?

• Weathering is the process of transporting rocks to new locations.

• Weathering is a crucial part of the rock cycle as it breaks down rocks into soil and sediments, which can then be transported and deposited, leading to new rock formation.

• Weathering is the process of forming igneous rocks from magma.

• Weathering has no impact on the rock cycle.

How does water contribute to weathering?

• It only causes mechanical weathering through freeze-thaw cycles.

• It contributes to both mechanical and chemical weathering.

• It has no effect on weathering processes.

• It only causes chemical weathering through reactions with minerals.

What is carbonation?

• A process where carbon dioxide in the atmosphere dissolves in rainwater, forming carbonic acid that reacts with minerals in rocks.

• A method of preserving food by sealing it in airtight containers.

• A technique used in photography to enhance image quality.

• A type of fermentation process used in brewing beer.

What is freeze-thaw weathering?

• A process where water enters cracks in rocks, freezes, expands, and then thaws, causing the rock to break apart over time.

• A method of rock formation through heat and pressure.

• A type of erosion caused by wind and sand.

• A geological process that involves the melting of glaciers.

What is hydrolysis in the context of weathering?

• A process where water evaporates from rocks

• A chemical weathering process where water reacts with minerals to form new minerals and soluble salts, often altering the rock's structure.

• A physical weathering process caused by temperature changes

• A process of sediment deposition in riverbeds.