GEOLOGY
PHYSICAL GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Physical weathering changes the composition of the rock while chemical does not
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Physical weathering only acts on sedimentary rocks while chemical weathering only acts on igneous rocks
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Physical weathering only occurs in warm climates while chemical weathering only occurs in cool climates
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Chemical weathering changes the composition of the rock while physical does not
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Detailed explanation-1: -Physical weathering involves the breakdown of rocks and soils through the mechanical effects of heat, water, ice, or other agents. Chemical weathering involves the chemical reaction of water, atmospheric gases, and biologically produced chemicals with rocks and soils.
Detailed explanation-2: -Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it to fall away.
Detailed explanation-3: -Chemical Weathering Chemical weathering changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.
Detailed explanation-4: -Minerals that are most reactive when mixed with water, oxygen and other elements will weather more rapidly, as seen in rocks that contain iron. Rocks that contain softer minerals, such as calcite, and those that are more porous, will also weather more rapidly.
Detailed explanation-5: -Chemical weathering occurs when chemical reactions break down rock, such as when rock is repeatedly exposed to water. Physical weathering increases the surface area of rocks, allowing more of the rock to be exposed for chemical reactions in chemical weathering.