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Entry of plant roots into cracks increases which type of weathering?

Answer and explanation

Correct answer: Biological weathering

Correct answer: A, biological weathering. Weathering means the breaking down or alteration of rock at or near its original place. When a plant root enters a small crack, it continues to grow and becomes thicker. Its pressure pushes against the sides of the crack, gradually widening it and helping the rock split. Because a living organism, the plant, causes this action, it is called biological weathering. A is correct because roots are living agents that physically break rock. B is wrong because marine deposition means the laying down of sediments by sea water, not the breaking of rock by roots. C is wrong because a seismic wave is energy from an earthquake, not a weathering category. D is wrong because magma flow involves molten rock inside or on the Earth, not root pressure. Memory cue: living organisms causing rock change means biological weathering.

Related tags

Plant RootsBiological WeatheringCracksWeathering: PhysicalChemicalAnd BiologicalWeathering Physical Chemical And BiologicalGeomorphic ProcessesGeographyClass 11 Mcq

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