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Resources for 5th Graders » Lesson 5

Lesson 5

Web Directory vs Search Engine
A Web directory attempts to organize Web sites into topics and subtopics. A directory depends on humans for its listings. You submit a description to the directory for your entire site, or editors write one for sites they review. If you're looking for information on the Web that fits neatly into a subject or category, try a directory first. If that is the case, a directory will help you find just a few links that are exactly what you need.
search engine will look for occurances of your keywords all over the Web. It doesn't understand what your keywords mean or why they're important to you. To a search engine, a keyword is just a string of characters. It doesn't know the difference between Cancer the crab in the zodiac, and cancer the disease. Often times you get too many links on subjects that you don't want.
Searching Using  Google Logo
Math commands:
+ anywhere in the document 
- nowhere in the document 
" " words in the same order in the document 
* wildcard - any form of the word
 
Let's search for: 

Atlantis which is the same as +Atlantis 

Venus

Dolphin
 

Other commands

link:http

site:http
 
  
What do the following symbols mean? How do you use them while searching the Internet?
 
"United States Marine Corp"
 
+cats +behavior
 
-dolphins +football
 
surf*