Darwin discovered twenty different species of finches in the galapagos islands. he hypothesized that as new islands arose, finches colonized the islands and rapidly changed into new species, depending on what food was available on each new island. the rapid formation of many new species, as in this case, is called a) gradualism. b) speciation. c) adaptive radiation. d) geographic isolation.

b. to discover aspects of the natural world.

hopefully i .

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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