Grand Canyon, A five-thousand-foot-deep canyon located in Arizona, a state in the USA. It was carved by the Colorado River over millions of years and is one of the best examples of weathering and erosion., paleontology, The branch of science that studies fossils of animals and plants., fossil, A fossil is evidence of past life on Earth., silt, Fine sand, clay, or other material carried by moving water and deposited at the bottom of a body of water like the ocean., sedimentary rock, Sedimentary rocks are made when sand and mud gets laid down in layers. Over time, these layers are squashed under more and more layers. Eventually, the layers turn into rock., radiocarbon dating, A method for determining the age of an object that is thousands of years old such as a fossil. It uses the element carbon to do this. Your pencil tip is out made of carbon..

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