Physical vs. Chemical Weathering

Front

What is physical weathering?

Back

Physical weathering is the process of breaking down rocks into smaller pieces without changing their chemical composition. Examples include freeze-thaw cycles and abrasion.

Front

What is chemical weathering?

Back

Chemical weathering involves the chemical alteration of minerals in rocks, leading to changes in their composition. Examples include oxidation and dissolution.

Front

What is oxidation in the context of weathering?

Back

Oxidation is a chemical weathering process where oxygen reacts with minerals, often causing rusting in iron-rich rocks.

Front

What is acid rain?

Back

Acid rain is precipitation that has a lower pH due to pollutants like sulfur dioxide and nitrogen oxides, leading to chemical weathering of rocks.

Front

How does freeze-thaw action contribute to physical weathering?

Back

Freeze-thaw action occurs when water seeps into cracks in rocks, freezes, expands, and causes the rock to break apart.

Front

What is an example of chemical weathering affecting buildings?

Back

Acid rain can dissolve limestone and marble in buildings, leading to structural damage.

Front

What is the difference between physical and chemical weathering?

Back

Physical weathering breaks rocks into smaller pieces without changing their composition, while chemical weathering alters the minerals in the rocks.

Front

What role does temperature play in physical weathering?

Back

Temperature changes can cause rocks to expand and contract, leading to cracks and eventual breaking.

Front

What is biological weathering?

Back

Biological weathering occurs when living organisms, such as plants and animals, contribute to the breakdown of rocks through physical or chemical means.

Front

How does water contribute to chemical weathering?

Back

Water can dissolve minerals in rocks, facilitating chemical reactions that lead to weathering.