What makes the crust move? A. Motion in the inner core
O B. Motion in the mantle
O C. Motion in the outer core
O D. Motion in the moon

What is the correct answer for the process of water eroding soil? rills, sheet erosion, gullies sheet erosion, rill, gullies gullies, rills, sheet erosion sheet erosion, gullies, rills

Organize the word parts according to where they appear in a medical term.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.