How did the rocks of the Great Plains and the Rocky Mountains form? Include the key concepts from Chapter 1 to help explain your answer. Use the following vocabulary words in your explanation: Sedimentary rocks, Igneous rocks, sediments, magma, compaction, cementation. You can use different variations of the words as you see fit.

i believe the answer would be b. hope it : )

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.