Finding sources (suggested answers)

Warm-up activity answers
 
blog (6): because it may belong to anybody, and it is impossible to be sure that owners of the blog have enough knowledge to rely on the information they provide)
Multi-purpose search engine (5): because it may generate all kinds of word matches, even if they are irrelevant to the topic at hand, and give links to all possible web-sites, both reliable and unreliable, it can be very time-consuming to filter the information)
e-encyclopedia (4): because it provides more or less accurate factual data about the general knowledge of the subject of your interest but usually does not give many details that might  be relevant for your topic)
e-journal (3): JSTOR has mostly academic articles, but some journals include both academic and non-academic articles - you should check the credibility of the authors in that case)
google scholar (2): because it gives scholarly articles written by honored specialists in their fields)
(UIUC) e-library web-site (1): mostly scholarly articles, might be easier to find the articles written by the professors of your university 

Task 1 answers

1. rank 5
2. rank 4
3. rank 2
4. rank 3
5. rank 1