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Weathering of rocks is caused by chemical and mechanical means, and the types of weathering are therefore generally classified as chemical or mechanical (also known as physical).
* Slightly acidic rainwater can react with rock surfaces, dissolving them over time. Rocks can also be affected by organic sources of chemical reactants. (chemical) * Heat from the sun can cause differences in temperature between the surface and the interior of a rock which can cause a loosening of the surface called exfoliation. (mechanical) * Liquid water penetrates cracks in the rocks surface where it can freeze and expand, opening up the cracks for further attack in tandem with acidic rainwater. (mechanical and chemical)
* Plant root growth can also cause cracks to further expand, making them more vulnerable to frost expansion and chemical attack. (mechanical) * Underlying rock which is exposed due to erosion of the overlying rock becomes free of the pressure it was previously exposed to, causing the rock to expand and break apart. (mechanical) * Other means of weathering include the expansion of crystallizing salts that have been taken in by a rock surface , expansion due to the absorption of water, and hydraulic action from crashing waves on seashore rock formations.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoFreeze-thaw, Onion-skin, Biological and Chemical.
Freeze thaw is when there is a crack in a rock, and water gets into it. at night the water freezes and expands making the crack larger. This repeats, eventually crumbling the rock. onion skin is where in the heat of the day, rocks expand. then at night they contract again. eventually this causes fragments like a skin to fall of. Biological is where animals or plant roots burrow into the rock, weakening it. Chemical is when a rock, such as limestone reacts with the rain and so is eroded.
Wiki User
∙ 13y agoI have only tree types.
sorry
1. Acid Reactions
Acids are chemical compounds that produce H+ ions when dissolved in water. The stronger the acid, the more H+ ions they produce. Acids can react with any rock mineral that has other positive ions, like Ca++, Na+, or K+, by taking their place - which changes the chemical composition of the mineral and disrupts its atomic structure.
The most important natural acid is carbonic acid (H2CO3), which forms from carbon dioxide and water (CO2 and H2O). Others include sulfuric acid (H2SO4) and hydrofluoric acid (HF) which mainly come from volcanic eruptions.
2. Hydration
The term 'hydration' refers to the absorption of water. The H+ and OH- ions of water incorporate themselves into the atomic structure of a mineral to form a new version of it called a hydrate. If the original mineral had a chemical formula of X, the new suite of minerals will have chemical formulas of X . nH2O. For example, anhydrite (CaSO4) exposed to water hydrates into gypsum (CaSO4 . 2H2O).
3. Oxidation
Oxidation is where oxygen from the atmosphere reacts with metal elements in the rocks to form oxides. The most common metal involved is iron. It reacts with oxygen to form iron oxide minerals such as hematite (Fe2O3) or, if water is present which it often is, hydration occurs in conjunction to form limonite (Fe2O3 . nH2O). Oxide minerals tend to be structurally weak and easily crumbled.
Wiki User
∙ 14y ago1. Hydrolysis
2. Carbonation
3. Oxidation
4. Acid Rain
Wiki User
∙ 13y agoOnion Skin, Freeze Thaw, Chemical and Biological.
Wiki User
∙ 12y agoAttrition, Abrasion, Solution, Hydraulic action
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Can you give me some notes about weathering?
There are two types of weathering: chemical and physical. Chemical weathering is said to occur when the chemical compounds of rocks are changed. Physical weathering happens due to wind, rain, or other natural occurrences.
What the differences between physical weathering and surface waters?
physical weathering is weathering that you can reverse and chemical weathering is where you can' reverse it.
Why does June and July have the highest rate of chemical weathering?
It has the highest rate of chemical weathering because chemical weathering occurs much faster in hot, humid climates. This makes rain forests a target for chemical weathering, and in hot seasons, the weathering skyrockets.
Which of these type of weathering does not require the presence of water?
Since you did not specify which types of weathering you meant (necessary for this question to properly be answered), I will just summarize a bit of basic information on weathering and try to answer as best as I can in the most general sense.There are three general types of weathering: mechanical (sometimes called physical), chemical, and biological. Chemical weathering entails the alteration of the chemical and mineralogical composition of the weathered material. Physical weathering is the breakdown of mineral or rock material by entirely mechanical methods. Biological weathering involves the disintegration of rock and mineral due to the chemical and/or physical agents of an organism.Chemical types can be caused by processes that require water (such as hydrolysis, or carbonation - when there is formation of carbonic acid from carbon dioxide and water). Physical types contain processes that may not, though. For example, a type of physical weathering is abrasion, which is when there are collisions that can be caused by wind (although it can also be caused by water or ice). Sometimes biological weatheringdoes not require water - such as when particles fracture because of animal burrowing or due to pressure being exerted by growing roots.
What are some differences of physical weathering and chemical weathering?
Physical weathering is due to: rocks hitting other rocks causing them to break up from the action of frost and ice the action of wind or waves or running water the action of plants. Chemical weathering changes the composition of the rock and is due to: water dissolving minerals in the rock oxidation of metals in the rock
How are weathering and chemical weathering related?
mechanical weathering and chemical weathering are related because their both are types of weathering
Are the three types of weathering?
biological weathering , physical weathering & chemical weathering.
What are the three weathering?
the 3 types of weathering are: Chemical Weathering Biological Weathering Physical Weathering
What are the 3 main types of weathering?
The 3 main types of weathering are: mechanical, chemical, and biological weathering.
What types of weathering that does not cause chemical changes?
mechanical weathering
How are mechanical and chemical weathering related?
mechanical weathering and chemical weathering are related because their both are types of weathering
What are the two main types of weathering?
chemical and mechanical weathering :P
What are four different types of chemical weathering?
The four different types of chemical weathering are hydration, oxidation, carbonic acid action and hydrolysis. Chemical weathering is a chemical reaction that erodes certain things such as building materials and rocks.
Explanations of the three types of weathering?
chemical weathering is when a chemical reacts with a rock to brake down a rock.
What are the 2 main types of weathering?
The two main types of weathering are physical weathering and chemical weathering. Physical weathering involves water, wind and dust scraping away at rocks, while chemical weathering involves chemicals, usually acids, breaking down the rock.
What are the different types of weathers?
Mechanical weathering, Biological weathering and Chemical weathering.
What are the sources of weathering?
weathering is the breaking down or dissolving of rock. There are 3 types of weathering chemical, physical and mechanical.
