Scientists have also identified more than 3 million locations in the genome where the nucleotide sequence differs among human beings. These differences are called single-nucleotide polymorphisms, or SNPs. SNPs make every person unique,

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.

here's your answer.