Weathering

What is mechanical weathering?

• The breakdown of rocks through chemical reactions

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

• The process of erosion by wind and water

Which of the following is an example of mechanical weathering?

• Rusting of iron

• Dissolving of limestone

• Freezing and thawing of water in cracks of rocks

What is chemical weathering?

• The process of rocks breaking down into smaller pieces through physical forces

• The process of rocks changing their chemical composition through chemical reactions

• The process of rocks being transported by wind and water

Which of the following is an example of chemical weathering?

• Crumbling of rocks due to plant roots

• Wearing down of rocks by wind and water

• Dissolving of minerals in rocks by acid rain

How does freezing and thawing contribute to mechanical weathering?

• By dissolving minerals in rocks

• By breaking rocks into smaller pieces through physical force

• By chemically changing the composition of rocks

What is the main agent of chemical weathering?

• Wind

• Water

• Sunlight

How does carbonic acid contribute to chemical weathering?

• By freezing and cracking rocks

• By dissolving minerals in rocks

• By causing rocks to rust

What is oxidation?

• The reaction of oxygen with certain minerals, causing them to rust

• The breakdown of rocks into smaller pieces

• The process of rocks changing their chemical composition due to water

How does climate affect the rate of weathering?

• Weathering is faster in wet and warm climates

• Climate has no effect on weathering

• Weathering is faster in dry and cold climates

How do human activities contribute to weathering?

• They slow down weathering processes

• They have no effect on weathering

• They can speed up both mechanical and chemical weathering