Question

Which of these actions is an example of chemical weathering?

Answer 1

Answer: Oxidation

Explanation: Oxygen causes oxidation. You can think about oxidation like rust on a car. Rust forms when the iron or steel in your car reacts with the oxygen in the air to form iron oxide. The resulting red substance can be quite brittle, so much so that you could literally poke a hole in it with your finger. Rocks with iron can go through the same process, too.

Minerals with high iron content are affected by oxidation including pyroxene and amphibole. The oxidation gives these rocks a reddish look, very similar to the patina on a car.

Answer 2

Step-by-step explanation:

For example, the reaction of carbon dioxide gas in rainwater can produce carbonic acid that dissolves some minerals, especially limestone. Acid rain caused by pollution such as factory and car exhaust is another agent of chemical weathering. Chemical weathering also occurs when iron in rock oxidizes or rusts.