Thus by 1803 there were two known rare earth elements, yttrium and cerium, although it took another 30 years for researchers to determine that other elements were contained in the two ores ceria and yttria (the similarity of the rare earth metals' chemical properties made their separation difficult).
For instance, students who pursue a Ph.D. in psychology usually take from five to seven years depending upon required coursework as well as internship and supervised residency requirements.
Getting a doctorate in forensic or child psychology takes a minimum of eight yearsâfour years of an undergraduate bachelorâs program, and four-to-six years of doctoral study. Many students choose to earn their masterâs before their Ph.D., which can add another two years.achelors in Forensic Psychology. Average timeline to earn a bachelorâs degree in forensic psychology is typically 4 years. Every graduate program has a variety of psychology prerequisites all accepted students must complete prior to enrolling.