How is chemical weathering different from physical weathering?
Chemical weathering requires a reaction with water, while physical weathering does not.
Chemical weathering involves plants and animals, while physical weathering does not.
Chemical weathering results in the breakdown of rock, while physical weathering does not.
Chemical weathering forms new substances, while physical weathering does not.
All the listed options contain accurate statements comparing chemical weathering and physical weathering. However, the most direct and comprehensive answer to the question would be:
Chemical weathering involves the chemical breakdown and alteration of rock minerals, resulting in the formation of new substances, while physical weathering involves the mechanical breakdown and fragmentation of rocks without any change in their chemical composition.
pick one
How is chemical weathering different from physical weathering?
Chemical weathering requires a reaction with water, while physical weathering does not.
Chemical weathering involves plants and animals, while physical weathering does not.
Chemical weathering results in the breakdown of rock, while physical weathering does not.
Chemical weathering forms new substances, while physical weathering does not.
My apologies for the confusion. The most accurate statement to answer the question would be:
Chemical weathering forms new substances, while physical weathering does not.
what are two examples of chemical weathering
Two examples of chemical weathering are:
1. Acid rain: Sulphur dioxide and nitrogen oxides released from burning fossil fuels combine with atmospheric moisture to form acids. These acids, such as sulfuric acid and nitric acid, can react with rocks and minerals, causing them to dissolve or undergo chemical changes.
2. Oxidation: When oxygen combines with certain minerals present in rocks, it can cause them to undergo chemical reactions. For example, the oxidation of iron-bearing minerals in rocks can lead to the formation of iron oxide (rust), resulting in the breakdown and weakening of the rock.
what else
Here are two more examples of chemical weathering:
3. Hydrolysis: Hydrolysis occurs when water reacts with certain minerals in rocks, causing them to break down. For instance, feldspar minerals can undergo hydrolysis in the presence of water, resulting in the formation of clay minerals.
4. Carbonation: Carbonation is the process by which carbon dioxide gas dissolves in water, forming carbonic acid. This acid can react with calcium carbonate minerals, such as limestone, causing them to dissolve and result in the formation of sinkholes and caves over time.
what about Carbonation and abrasion
Apologies for missing out on carbonation as an example in my previous response. Here is the information you requested:
Another example of chemical weathering is carbonation:
5. Carbonation: Carbonation occurs when carbon dioxide from the atmosphere or soil dissolves in water, forming carbonic acid. This weak acid can react with minerals like calcite present in rocks such as limestone, causing them to dissolve and break down over time.
Now, let's address abrasion. Abrasion is not considered a form of chemical weathering; it is a type of physical weathering.
6. Abrasion: Abrasion is the wearing down or polishing of rocks through frictional forces. It occurs when particles or sediments are moved by wind, water, or ice and scrape against the surface of rocks, gradually eroding them over time. While it does cause physical breakdown and fragmentation of rocks, it does not involve any chemical reactions or the formation of new substances.