• The rock cycle describes each of the main types of rocks, how they form, and how they change.
  • The three main rock types are igneous, metamorphic, and sedimentary.
  • These are the processes that change one rock type to another rock type.
  • The processes involved in the rock cycle take place over hundreds, thousands, or even millions of years.
  • Use this video to answer the questions that follow.
  • The Rock Cycle: How can you tell a sedimentary rock from another type?
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