Topic
#3 Global Change & the Challenge of Quantifying It
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As part of the presentation we watched a You Tube video at the 350.ORG website: http://www.350.org/mission
Sep 1, 2009
In class today we did the following:
1.
Dr H gave a presentation on
Topic
#3 Introduction to Key Issues of Global Change & Quantifying Nature:
As part of the presentation we watched a You Tube video at the 350.ORG website: http://www.350.org/mission
We also watched the classic POWERS OF 10 VIDEO. You can watch it online again at YouTube by clicking on the following link:
POWERS OF 10
"A Journey dealing with the relative size of things in the universe and the effect of adding another zero"See additional Powers of 10 links on the NATS 101gc Webpage under GLOBAL CHANGE LINKS.
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SCIENTIFIC NOTATION REVIEW: Students were urged to
"brush up" on the scientific notation rules on
p 18 of
CLASS NOTES (when you get your copy)
SGC-II (second half of book) Chapter 2 also has a review and some practice questions.
Here are the answers to the Scientific Notation Practice questions on p 18 in Class Notes:
Examples: (7.5 x 10 5) / (2.5 x 10 2) = 3.0 x 10 3
Answers:
Wavelength of UV radiation = .0000001 mPopulation of the world = 6 x 10 9 people
Ratio of Earth diameter to diameter of a carbon atom =
1 x 10 7 / 1 x 10 -10 = 1 x 10 17
ALSO:
OFFICE HOURS for Dr H & the TA's are being held this week -- see the Teaching Team link on the webpage for times and locations.
Be sure you've filled out and turned in your short
background form. You will be administratively dropped from the course if I
don't get your form in by Thursday Sep 3. C
IF YOU MISSED CLASS TODAY:
Review the presentation for Topic #3 that you missed (by clicking on the presentation link above) & view the 350.org and Powers of 10 Videos (see links above).