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Physical weathering is mechanical action which typically erodes rock faces. This invariably results in a smaller rock.

Chemical weathering involves water absorption or other reactions. Mechanical heating and freezing can crack and fissure the rock, slightly increasing its size. In general, physical weathering is an abrading process, whether via water born sediment wearing away the rock, or wind blown particles sand blasting the rock, and these actions make reduce the rock's size.

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Related Questions

How do you make a crack rock bigger?

chemical weathering.


How does igneous rock changes into sedimentery rock?

By weathering either by physical or chemical weathering.


What type of weathering occurs when only the size of the rock change?

physical weathering


What is weathering that does not alter the chemical composition of the rock called?

The type of weathering that does not alter the chemical composition of the rock is called physical weathering. The acid weathering usually alter the chemical composition of a rock.


Is water freezing in cracks in a rock a physical weathering?

Yes, water freezing in cracks in a rock is a form of physical weathering called frost wedging. As water freezes, it expands, putting pressure on the rock and causing it to break apart over time.


How does physical weathering cause chemical weathering to be more effective?

by helping each other by breaking down the minerals


What are to kinds of weathering?

the types of weathering are physical and chemical. physical: like rain and ice breaking a rock. chemical: like acid rain breaking down a rock.


What are the 2 main types of weathering?

The two main types of weathering are mechanical (physical) weathering and chemical weathering. Mechanical weathering involves the physical breakdown of rocks into smaller pieces, while chemical weathering involves the alteration of rock materials through chemical reactions.


What causes physical weathering but not chemical weathering?

Physical weathering is caused by mechanical forces such as temperature changes, frost wedging, and abrasion, while chemical weathering involves the breakdown of rock through chemical reactions like oxidation and hydrolysis. Physical weathering does not change the chemical composition of the rock, whereas chemical weathering alters the mineral structure.


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


Explain the difference between chemical and physical weathering?

Chemical weathering involves the breakdown of rocks through chemical reactions, such as oxidation or dissolution. Physical weathering, on the other hand, occurs when rocks are broken down into smaller pieces through physical processes like freezing and thawing, or abrasion. Chemical weathering changes the composition of the rock, while physical weathering only breaks the rock into smaller pieces.


What is the breaking down of a rock into smaller pieces?

physical weathering