APES 9/10-9/11Welcome back!

Please take out your Chapter One HomeworkTurn in your Ecosystem Diagram to the inbox, if you

haven’t alreadyLog in to a netbook

Did you share your Lorax assignment with me?

Warm-Up 9/10-9/11Currently 7.2 billion people live on the Earth. a. How many more people do you think the

Earth can support? b. Why do you think it can support that

many? c. What is going to happen when we reach

the point where earth can no longer support all the people?

Learning TargetsI can calculate population density, birth rate,

death rate, growth rate, and doubling time.I can create an age structure diagram and

use it to predict population trends for a given country.

Chapter One HW ReviewGet a textbook for your table.Go around the table sharing multiple choice

answers and discuss any you are struggling with.

Be prepared to share any you can’t get as a group!

Next book HW….there will be an open-note quiz!

Module One Multiple Choice1. Answer: D (I and III only)Why? Fracking, which extracts natural gas from the ground, decreases coal use because people can use natural gas instead!

2. Answer: BWhy? Abiotic means non-living, and rocks are non-living

Module One Multiple Choice3. Answer: CWhy? Ecosystems include biotic and abiotic components, including humans

4. Answer: CWhy? The use of fire by Native Americans allowed grasslands, a whole new ecosystem to form. This was a positive impact.

Module 2 Multiple Choice1. EWhy? Pollution in a LOCAL stream isn’t enough information to indicate overall global health

2. AWhy?500 acres x .405 ha = 200 ha (line up and cancel units!)

1 acre

Module 2 Multiple Choice3. EPer capita = per personThere are 4x as many people in developing countries but they only use 10% more meat and fish. Per person, developed countries must consume 4x more fish.

4. C640,000 ha x 1 year x 1 day = 73 ha 1 year 365 days 24 hrs.

5. DWhy? Ecological footprint includes ALL consumption and by products of that consumption.

Module 3 Multiple Choice1. BWhy? Scientists have to observe a phenomenon before hypothesizing about it.2. BPrecision = able to do the same thing over and overAccuracy = able to give a measurement that is trueDevice 1 was far from the actual 400 ppm, but right around 416 each time.

Module 3 Multiple Choice3. DEven though Device 2 wavers a bit, it is very close to the true amount of lead. It is accurate and precise. ppm = parts of lead in a million parts of water

4. A Why? Actually, I think studying natural systems can be dangerous. This is a terrible question written to match the book.

Module 3 Multiple Choice5. DWhy? A control group needs to be the same as your experimental group, except it isn’t being exposed to the manipulated variable.

Ex: You slam your hand in the car door. Both hand are under the same conditions, except the manipulated variable is the impact of a car door. You compare your good hand (control) to the bad hand (experimental)

End of Chapter QuestionsQ and A Why?

1. D Reduced human population growth hasn’t happened

2. B They all sound a little true….watch out for ONLY, ALWAYS, etc.

3. B Both population and food production have increased, although population has increased by much more

4. B A- it’s from the ice, not the air C- Can’t replicate; once the sample is taken, it’s contaminated D- Only part of an ecological footprintE- This is long term temp, NOT seasonal

5. C Footprint doesn’t help you unless you know how may people are consuming at that rate. Again, a question where you pick the BEST answer.

6. C A natural law is true every time (i.e. gravity), while a theory COULD be disproven (although it has a TON of evidence)

End of Chapter QuestionsQ and A Why?

7. E Some forest fires are not anthropogenic (caused by man)- lightning, etc.

8. B 1950- 250 grain per capita 2000- 300 (50/300 = 20%)

9. E From the reading on page 10

10. D A null hypothesis is a statement you are trying to prove wrong. The statement that caffeine has no effect on pulse rate is your baseline hypothesis that your data should contradict.

11. A B doesn’t match the data; C, D, E are all inferences/opinions

Chapter 7 HomeworkDue Monday the 21st/Tuesday the 22nd.Document on my website under

Lab/Activities/HW Link.

Who are all these people? What is their life like?Find the document called “world of 100

people” on my websiteFill it in with your best guesses!

https://www.youtube.com/watch?v=4B2xOvKFFz4

http://www.economist.com/blogs/graphicdetail/2014/11/daily-chart-10

Local/Nat’l Pop. measurementsWe measure populations using a few tools:

Population density = population area

Ex: Maple Valley’s density in 2014 was 3966 people/1 sq. mile

Birth Rate = births in one year x 100 total population

Death Rate = deaths in one year x 100 total population

Local/nat’l Pop. MeasurementsImmigration = migration of people into a country Emigration = migration of people out of a country

Population growth rate = (births + immigration) – (deaths + emigration) x 100 total population

What is the population growth rate of Maple Valley if there were 259 births, 150 immigrants, 199 deaths, and 75 emigrants in 2014? The total population is 24,512.

Now go back and calculate the birth and death rates!

Rule of 70Calculate Doubling Time 70 = Doubling Time growth as a %(growth rate is called r)

In 1980 a country has one million people and a 2% growth rate, in what year will its population have doubled?

70/2% = 35 1980+35 = 2015

Global Population MeasurementsIt is easier to calculate birth and death rate

per 1,000 people than per 7.2 billion peopleCBR (crude birth rate) = births per 1,000 people

CDR (crude death rate) = deaths per 1,000 people

Global population growth= (CBR – CDR)10

Why no immigration or emigration?

An Even Better Tool for Global Analysis!Age Structure Diagrams!

Vertical Axis - Age Groups

Horizontal Axis- Population Numbers

Young dependents

Working population

Elderly dependents

What is an Age Structure Diagram?

Age Structure DiagramsProfile of country’s residentsGives us a glimpse into large-scale health

events and future growth/decline

US Baby Boom after WWII

Due Next TimePower of the Pyramids Activity