Most populations demonstrate growth, in which the population size increases exponentially until it levels off near the k value of the habitat for that species. intrinsic logarithmic logistic exponential extrinsic

Exponential growth then logistic growth as it levels off due to carrying capacity

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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