PDS APES 8th Period 2009-10

Dr. Crumley sent me this one…. Source: http://andrewsullivan.theatlantic.com/.a/6a00d83451c45669e20120a95679e3970b-popup

There are two “Human Population Problems” that we discussed in class on Friday: The Annual Growth Rate (AGR) of a population is too high, leading to problems with overpopulation. The AGR of a population is too low, leading to problems involving a “graying,” or aging overall population. Big Picture: How to responsibly address an AGR that is too high. There [...]

I’m about to check out and go to bed. Good luck. Just wanted to leave you all with this video that started this lesson. Wonder if we’ll see human population start to level out more in your lifetime. AGR has decreased a tiny bit over the last 50 years…

*Note: This is a guest blog post by Michael G. in the other class.  Thought he did a nice job reviewing trends and key vocab for test.* Urbanization is the demographic shift from rural areas to cities and their outlying urban areas. There are five major global trends regarding this phenomenon that you need to [...]

_________________________________________________________ Today, we learned about Demographic Transition. It is best illustrated by a graph displaying the CDR (Crude Death Rate), CBR (Crude Birth Rate), and Population size. The model that we use has four stages: The first stage is the pre industrial stage–generally tribal nations–and are non-existent these days. In the first stage, the CDR and [...]

If you enjoyed the TEDTalk by Hans Rosling, I wanted give a chance to learn more about his work. First, here is today’s video if you want to watch it again: Second, if any of you are interested in more about the stats in the presentation go to Dr. Rosling’s web site: http://www.gapminder.org/ Explore the [...]

On the APES exam in the spring, we will deal with 3 basic population problems calculator-less. They generally deal with human population growth: The Rule of 70 Used for finding the time it will take for a given population to double, where the Annual Growth Rate (AGR) is expressed as a percent When using the [...]

Alright, so #17 on our Chapter 6 study guide asked a question along the lines of “What happens when a population transitions from exponential to logistic growth?” The only thing that I could deduce from the reading was that the population “settles in” by fluctuating sinusodially around K. But the question in the study guide [...]

Every Env. Sci. text presents two prototypical growth curves for a population: The “J” Curve (for exponential growth) The “S” Curve (for logistic growth) Each curve is drawn from a few base assumptions: The “J” Curve assumes growth rate is constant, and resources are unlimited. Growth occurs at the intrinsic rate of growth (r). So, [...]

Friday was an exciting and fun filled day overcrowded with Population Biology: thestudy of  characteristics of populations.   Population Biology is broken down into five ways to describe populations: 1- Age Structure 2-Geographical Distribution 3-Size 4-Density 5-Growth Rates These five categories are used to describe populations and create maps or charts filled with population related  [...]