You must write 4 to 6 sentences to get a target.  If you write more than 6 sentences, you get a + plus.  If you write fewer than 4 sentences, you do not pass. You get a -.  This is a “quad cluster”.  You are supposed to choose which three terms belong together and which one is different.  You must also tell me as much as you can about each of the terms.  Don’t forget to grade yourself.

REMEMBER! Don’t give me one or two sentences, I want at least 4. 

“divergent boundary, convergent boundary, Pangaea, transform boundary”