Day 13 What is the rock cycle? The rock cycle is a series of processes that cause rocks to change from one type to another. This cycle has been going on since Earth formed. It is still happening today, and it will continue as long as Earth exists. Daily Warm-Up Exercises 1 Relative Scale and Magnification Exercise 4.1 2 CaSE Book Student Resources Book, page 35 3 Labeling in Diagrams Exercise 4.2 4 Study this image: 5 Which has a larger particle size? Cobble or Pebble? 6 Study this image: 7 Which has a larger particle size? Sand or Silt? 8