4th grade, Science standard "4.a. Students know how to differentiate among igneous, sedimentary, and metamorphic rocks by referring to their properties and methods of formation (the rock cycle)" http://www.cde.ca.gov/be/st/ss/documents/sciencest..
Source: California Department of Education. (2009, June 11). http://www.cde.ca.gov/be/st/ss/documents/sciencestnd.pdf
Click on the video and watch this YouTube video that shows how rocks are formed and what processes form the different rocks.
Source: callieekirsch. (2013, November 3) the rock cycle introduction. https://www.youtube.com/watch?v=zqbjjPNMK-g
Click on the link and read this article, it will help answer the questions.
Source: KIds-Fun-Science.com, (2011-2015). http://www.kids-fun-science.com/rock-cycle.html
Click on the source link and read the first article on the web site and answer the following questions.
Source: Rock Cycle Igneous, Sedimentary, and Metamorphic Rocks. http://geography.about.com/cs/physicalgeography1/a/rockcycle.htm