K12> Population Clocks -- Network Nuggets
- From: Gleason Sackmann <gleason@xxxxxxxxxxxxxxx>
- To: NetHappenings <nethappenings@xxxxxxxxxxxxx>
- Date: Wed, 26 Feb 2003 09:08:26 -0600
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From: "nuggets ola" <nuggets@xxxxxxxxx>
To: <networknuggets@xxxxxxxxx>
Sent: Tue, 25 Feb 2003 08:37:25 -0800
Subject: Population Clocks -- Network Nuggets
*** [[[ POPULATION CLOCKS ]]] ***
http://www.statcan.ca/english/edu/clock/population.htm
This is for Math and Social Studies teachers.
A population clock displays a momentary or instant
estimate of a country's population, based on recent
trends. Formerly you had to travel to a museum to see
one, but the Web brings them all to your desktop.
The above link is to the population clock for Canada,
recently added to Statistics Canada's website and
based on Canada's 2001 census.
For reasons that Math teachers may wish to discuss
in class, the absolute number of people shown is not
accurate to the last individual, but the observed rate
of population increase (counting speed) is precise if
the country underwent a recent census.
There are several World Population Clocks and they use
different calculations, so it's a case of which authority
you trust. Many countries' censuses are erratic so more
assumptions underlie the data. Here are clocks from
Princeton University, the University of California at
Berkeley, and the Musée de l'Homme in Paris:
http://opr.princeton.edu/popclock (uses Java)
http://math.berkeley.edu/~galen/popclk.html (non-Java)
http://www.popexpo.net/eMain.html (uses Java)
The U.S. Census Bureau conveniently puts the U.S and
World population clocks in the same small window:
http://www.census.gov/main/www/popclock.html (uses Java)
The calculation basis is not given; I'll suggest, from
data elsewhere on the Census Bureau website, that it
represent a U.S. birth every 7.9 seconds, a death every
12.9 seconds, and a new immigrant every 33 seconds.
Can your students do that calculation?
The Bureau of Statistics in Australia, where Nuggets has
a number of readers, reports a smaller and slower-growing
population but has a longer URL for the population clock:
http://www.abs.gov.au/Ausstats/ABS@.nsf/94713ad445ff1425ca25682000192af2/1647509ef7e25faaca2568a900154b63!OpenDocument
None of these sites carry advertising.
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