Dr. Marcus developed a study examining verbal arguments in movie theaters. His research protocol and coding systems specified that trained observers were only supposed to observe theater goers for a specific period. The trained observers were supposed to observe whether a verbal argument did or did not occur for 15 minutes and then not observe for 10 minutes and then observe again for 15 minutes and so on until the movie ended. This would be an example of:

president reagan was a good presidant and should be presidant if he was still alive

explanation:

well, there are a lot of places we get information about earth from. like science classes, websites, books, newspapers, etc.

well, i can't read it so i'll ask you questions about it : )

if you were a reader and you read the introduction, would you want to read more?

does it start with a question? if so, is it something you would want to read about?

and ask any friends or family for their opinion : )