How can I easily study the rock cycle?

Are you asking for a certain recommendation? If so I can provide at least to websites.  

Interactives . The The Rock Cycle . The Rock Cyclewww.learner.org

and,

The Rock Cycle Steps & Science Lesson - Learning Centerlearning-center.homesciencetools.com

I apologies that I don't have more, I was working on the subject recently. If I find another I can get back in touch with you.

Explanation:

(again I am not completely sure this was your question)

I hope this helps you as much as intended.

To model the sedimentary rock cycle, simply sandwich crayon shavings in some aluminum foil and hammer until the shavings stick together. Notice how you can still clearly see the individual pieces that make up the “rock.” Also notice how easy it is for pieces of the rock to fall off.

Explanation:

the roman republic

for us its called a jury or court romans used this when someone was on trial and the republic   would choose guilty or innocent same with jury today

you better keep your !