Which of these describes the energy transformation that occurs when an athlete runs a marathon? O The chemical energy expended is less than mechanical, heat, and sound energy produced The chemical energy expended equals mechanical energy produced. O The chemical energy expended equals mechanical, heat, and sound energy produced The chemical energy expended is greater than mechanical, heat, and sound energy produced​

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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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