Weathering Processes and Influences

The video explains weathering, the breakdown of rocks at the Earth's surface, and distinguishes it from erosion. It covers two types of weathering: mechanical, which involves physical forces breaking rocks without changing their composition, and chemical, which transforms minerals into new substances. The video also discusses factors affecting weathering, such as climate, rock type, and topography.

What is the primary difference between weathering and erosion?

• Weathering is the breakdown of rocks, while erosion involves movement.

• Erosion is the breakdown of rocks at the Earth's surface.

• Erosion occurs only due to biological activity.

• Weathering involves the movement of rocks.

Which of the following is NOT a process of mechanical weathering?

• Abrasion

• Oxidation

• Salt crystal growth

• Frost wedging

How does frost wedging contribute to mechanical weathering?

• By plant roots growing in rock fractures

• By chemical reactions with oxygen

• By expanding water in cracks during freezing

• By dissolving minerals in water

What role does water play in chemical weathering?

• It prevents oxidation.

• It only causes physical changes.

• It is the most important agent, facilitating reactions.

• It acts as a non-reactive agent.

Which process involves the transformation of feldspar into clay?

• Abrasion

• Hydrolysis

• Oxidation

• Frost wedging

What is the main agent in the solution process of chemical weathering?

• Water

• Salt

• Carbon dioxide

• Oxygen

Which climate condition is most conducive to chemical weathering?

• Cold and wet

• Cold and dry

• Hot and wet

• Hot and dry

How does rock type affect weathering susceptibility?

• Rock type has no effect on weathering.

• Rocks with low crystallization temperatures are more stable.

• Rocks with high crystallization temperatures are more stable.

• All rocks weather at the same rate.

What is the effect of topography on weathering?

• Topography has no effect on weathering.

• Gentle slopes have higher physical weathering.

• Steep slopes have higher chemical weathering.

• Steep slopes have higher physical weathering.

How does time influence the degree of weathering?

• Shorter exposure leads to more weathering.

• Longer exposure leads to more weathering.

• Time has no effect on weathering.

• Weathering is instantaneous.