Weathering Processes and Effects

The video tutorial explains weathering, the process of breaking down rocks through physical and chemical means. Physical weathering involves changes in temperature, pressure, and biological activity, while chemical weathering involves reactions with oxygen and acids. The video highlights examples and agents of both types of weathering, such as temperature fluctuations, plant roots, and acid rain.

What is the process called when large boulders break down into smaller pieces over time?

• Deposition

• Sedimentation

• Weathering

• Erosion

Which of the following is NOT an agent of physical weathering?

• Oxygen

• Water

• Temperature changes

• Gravity

How does temperature change contribute to physical weathering?

• By causing rocks to expand and contract

• By causing rocks to melt

• By dissolving rocks

• By freezing rocks

What is the term for the process where outer layers of rock peel away due to pressure changes?

• Erosion

• Abrasion

• Exfoliation

• Sedimentation

Which animals are known to contribute to physical weathering by digging burrows?

• Snakes

• Prairie dogs

• Fish

• Birds

What is abrasion in the context of physical weathering?

• The melting of rocks

• The wearing away of rock by mechanical action

• The chemical breakdown of rocks

• The freezing of rocks

What happens to rocks containing iron when they undergo chemical weathering?

• They turn reddish orange

• They dissolve completely

• They become transparent

• They turn blue

What is the result of increased acid levels in the atmosphere on rocks?

• Rocks become magnetic

• Rocks break down faster

• Rocks change color

• Rocks become harder

What is acid precipitation and how does it affect rocks?

• It is a type of hail that protects rocks

• It is a type of rain that causes rocks to break down

• It is a type of rain that strengthens rocks

• It is a type of snow that polishes rocks

How do lichens and mosses contribute to chemical weathering?

• By producing strong acids

• By producing weak acids

• By physically breaking rocks

• By covering rocks completely