Ring vs. Rang vs. Rung. You can tell when to use ring, rang, or rung by whether you need the present, past, or past participle (used with has or have) form. I always ring the bell after I knock. He rings twice before entering.
The rocky mountains passes through six states. The six US states  are: New Mexico, Utah, Colorado, Idaho, Montana, and Wyoming.
Appalachian Mountains, Rocky Mountains, Alaska Range AM. http://geography.howstuffworks.com/unite... Rocky Mountains--a major mountain system in the western United States and Canada Sierra Nevada--lies almost entirely in California Appalachian Mountains --extend from eastern Canada to central Alabama.