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Metamorphism will alter the chemical molecules in a rock as it cools down, Otherwise, weathering will alter old molecules and create new ones.
That is officially known as a chemical change. It is distinct from a physical change which does not alter a substance into a different substance.
chemical change
did the composition change
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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.
Chemical changes
mechanical weathering (by wind or water or perhaps tenacious plant roots or human activities)
Nothing. Melting is a physical change and does not alter the chemical composition of a substance.
Chemical substance that alter perceptions and mood are called Psychoactive Drugs.
Weathering is going to degrade or otherwise alter the nature, structure or composition of the actual insult or contaminant. Transportation mechanisms merely move the contaminant, unaltered, to other locations.
Characteristics of polymers can be altered by: irradiation, treatment with oxygen or other chemicals, rising the temperature, using additives in the composition.
A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.
Chemical weathering
Yes, chemical weathering affects the high plains. The high plains are primarily composed of sedimentary rocks, which are susceptible to chemical weathering processes such as dissolution and oxidation. Over time, these processes can break down the rocks and alter their composition, leading to changes in the landscape of the high plains.
Weathering and erosion would alter the shape of a rock, as would the application of stress possibly combined with high(er) temperature conditions.