Understanding the Weathering Processes

Which of the following is an example of mechanical weathering?

• Rusting of iron-rich rocks

• Formation of carbonic acid

• Expansion of ice in rock cracks

• Dissolution of limestone by acid rain

How do plants contribute to mechanical weathering?

• By releasing carbon dioxide that forms carbonic acid

• By growing roots that widen cracks in rocks

• By producing oxygen that causes oxidation

• By absorbing water and preventing ice formation

What is the role of carbonic acid in chemical weathering?

• It causes rocks to expand and contract

• It dissolves limestone and forms caves

• It oxidizes iron in rocks

• It freezes in rock cracks and widens them

Tags

NGSS.MS-ESS2-2

Which human activity can accelerate the process of weathering?

• Planting trees in rocky areas

• Burning fossil fuels

• Building underground tunnels

• Using limestone in construction

What is the effect of acid rain on historic buildings and monuments?

• It strengthens the stone structures

• It makes inscriptions clearer

• It rapidly weathers the stone

• It prevents further weathering