Weathering and Soils: Chemical Weathering

The video tutorial explains chemical weathering, highlighting how steam and water alter rocks through chemical processes. It details the formation of carbonic acid from rainwater and carbon dioxide, which breaks down rocks like calcite and limestone. The video also covers oxidation, where oxygen combines with iron to form rust. Finally, it discusses acid rain, formed from pollutants like sulfur dioxide, and its harmful effects on the environment and structures.

What is the primary difference between chemical and mechanical weathering?

• Neither process changes the chemical composition of rocks.

• Both processes change the chemical composition of rocks.

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

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

Which agent is most responsible for chemical weathering?

• Wind

• Temperature

• Water

• Sunlight

How does carbonic acid form in nature?

• By mixing rainwater with sulfur dioxide

• By mixing rainwater with oxygen

• By mixing rainwater with nitrogen

• By mixing rainwater with carbon dioxide

What is the process called when iron in rocks rusts?

• Hydration

• Oxidation

• Carbonation

• Erosion

What causes acid rain to form?

• The release of oxygen into the air

• The release of sulfur dioxide from burning coal and oil

• The release of carbon dioxide from plants

• The release of nitrogen into the air