GCSE ICT - mr hennessey dot com
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Transcript GCSE ICT - mr hennessey dot com
GCSE
ICT
Year 9 Project 1a Collecting Information
OBJECTIVES
By the end of this lesson you will:
• Understand the benefits of using more than
one search engine
• Be able to discuss the problems when
searching on the Internet
• Be able to search the Internet efficiently using
advanced search criteria
Search Engines
• There isn’t one search engine that covers all
of the Internet
• Using more than one may find more results
• Some search engines may return better
results than others
Search Engine
Self-Report. Size
(Billions)
Est.
Size
(Billions)
Coverage
Of Indexed Web
Coverage
Of Total Web
Google
8.1
8.0
76.2%
69.6%
Yahoo
4.2
(est)
6.6
69.3%
57.4%
Ask
2.5
5.3
57.6%
46.1%
MSN
(beta)
5.0
5.1
61.9%
44.3%
Problems with Internet Searches
Problems with Internet Searches
• Too many results
Searching for Doctor returned 4,240,000 pages
• Too much irrelevant information
Searching for Doctor returned information on:
-
Doctor Who
DIY Doctor
Bicycle Doctor
Doctor Job
Travel Doctor
Wine Doctor
• Takes too long to find relevant information
The Effective Internet Search
• The more words used the more specific the
search will be
• Medical Doctor is better than just Doctor
• You can use the AND, OR, NOT, +, - “ “,
operators to make improve your search
• You can use a search engines advanced
search page
Search Criteria Operators
• AND/+: used to search for more than one word such
as Doctor AND Salary. Returns all web pages with
these words on it anywhere
• OR: used to search for one word or another such as
Salaries OR Qualifications. Returns all web pages
with either of these words on it
• NOT/-: used to exclude a word from a search so
Doctor NOT Who will not find pages about Doctor
Who. Returns all web pages with the first word but
not the second one.
• “ “: used to search for specific phrases or questions
such as “nurse’s duties” or ”how much does a nurse
earn”. Returns all web pages with these words on it
and the words are together in the same order.
Advanced Search Pages
• Google advanced search page gives you
many useful options:
Advanced Search Pages
• Allows you to combine AND, OR and NOT searches
• Choose: language, when it was created, where the
information is found, the type of domain
Advanced Image Search Pages
• Allows you to specify:
The size you require
The file types as jpg tend be to photographs while gif tends
to be more cartoon or clipart like
Choose the colours used such as black and white,
greyscale or coloured
Section 1 – ICT Searches
• You must provide evidence of several searches
covering more than one career
• The first search MUST BE BASIC AND ONLY USE
ONE WORD AND NOT FIND ANY USEFUL
INFORMATION e.g. Doctor
• The second search must be complex and improve
on the first search e.g. Doctor AND Salary
• All other searches must be complex searches
• The reasons for the criteria should demonstrate you
know how to search effectively:
“because it will find more specific results”
“because by searching for Doctor AND Salary the search
engine will find all web pages that contain both words
therefore finding more specific results.”
Homework
1. Collect at least two photocopies of leaflets on more
than one of the careers you have chosen to include
in your booklet from the school careers library