PDS APES 8th Period 2009-10

GO TO BED. I AM. BRAIN RULE #7: SLEEP WELL, THINK WELL.

Hey guys, do we have to know the different river zones? Crenon, Rhithron, Potamon, and thier characteristics?

Billion vs Million – Watch out for this!

Here are some important numbers that should help give things context

4.5 Billion- How long Earth has been around

3.7 Billion- How long life (bacteria) has been around

6.7 Billion- Approx Earth’s human population

20%- Approx percentage of people living in DEVELOPED countries

2.1- Replacement Fertility Rate in most DEVELOPED countries

1.2%- World’s Annual Growth Rate

0- The number of countries in stage ONE of the demographic transition

99%- of all species that have ever existed  are extinct

100%- The difference between 1% and 2%. Be careful!

1000- The number out of which CBR and CDR are calculated

Doubled- The world population since 1968 (Mr. W’s bday!)

5- The number of MASS EXTINCTIONS shown in the geological record

2%—>50%- The  increase in global urban population between 1850-2007

Please contribute more if you think of them!

Too funny (and correct) to not share:

I’m reviewing my case studies for population but there is nothing here about Japan, and I know I’ve heard Mr. W mention Japan enough times to scare me into thinking its going to be on the exam.
From what I understand Japan’s age structure is that there are more old folk now right? Can anyone elaborate what the big deal about Japan’s situation is?

I noticed that on the review sheet we are supposed to have 15 questions on “Ecosystem Terms, Concepts, and Diagrams.” What exactly does this refer to? Just things like ‘community’ and the levels of organization, or something else?

Mr. Willard,

On the study guide you were talking about how we needed to study “environmental history.” Are you talking about that fat packet you gave us at the beginning of the year with people like John Muir….?

I wasn’t here in class when we learned about these. This is what I know about Soil Horizons; if someone can add/clarify, that would be GREAT.

A Horizon: topsoil/vegetation

B Horizon: subsoil/inorganic material and broken down rock

C Horizon: parent material/bedrock

O Horizon: ?

I can’t find what the limiting factors are on land and water in my notes. We talked about it, I just can’t find them.

Correct me if I’m wrong…

Land: Precipitation/Water

Water: Temperature or nutrients?

My question is about a term from our first study guide. What does it mean for a resource to be potentially renewable? I left this blank on my study guide too.