Friday, January 31, 2014

Social Impacts

Friday's DOL Quiz:

1. Populations that have reached
carrying capacity usually have —

A. a J­-shaped growth curve
B. an S-­shaped growth curve
C. increasing population size
D. linear growth

2. The human population has grown
from .5 billion in 1650 to 7 billion by
the end of 2011. What population
growth model BEST represents the
graph shown here?

A Exponential Growth Model
B Logistic Growth Model
C Predator/Prey Cycle
D Declining Population Mode

3. Scientists write computer programs
to model populations of organisms
within ecosystems. By combining
these systems with geographic
information software, very accurate
predictions can be made. Which of
the following is a valid reason to use
computer systems to study
population dynamics in this manner?

A. There are no effective methods
to estimate population numbers
without using a computer.

B. Computer modeling could be
limited by the amount of data
available for the study.

C. By changing initial numbers of
individuals and survival rates,
these programs can simulate
what will happen to members of
the ecosystem in the future.

D. Computer modeling eliminates
the need for mathematical skills
and knowledge of the
researchers.


 
 
4. Which age structure diagram represents a country in an early demographic transition?
 
5. Which age structure diagram represents a country in a late demographic transition?
 
 
 
 
 

Thursday, January 30, 2014

POPULATION MOMENTUM

1/30/2014
Quiz (yesterday's DOL):

1. Draw the shape of population pyramid (age structure diagram) for a country LATE in the demographic transition.

2. Draw the shape of population pyramid for a country EARLY in the demographic transition.

3. What is the relationship between economic development (First/Second/Third World) and demographic transition (Early, Middle, Late)? Why?


4. In 1950, the population of Oak Cliff, was 20,000. The birth rate was measured at 25 per 1000 population per year, while the death rate was measured at 7 per 1000 population per year. Immigration was measured at 600 per year while emigration was measured at 200 per year. Calculate the rate of growth.

5. Calculate the population size in 1951.
 

6. Calculate the doubling time for this population.


Population Momentum Step 1

Population Momentum Step 2

For Your Consideration


Wednesday, January 29, 2014

Age Structure Diagrams and Demographic Transitions: Lesson 1, Steps 1 &2

1/29/2014

You will use an online simulator to observe demographic transitions today.

Visit the Habitable Planet Website

1. Open the Simulator in another window.

2. Read through the lesson 1. You can click on the blue words "Unit 5" to get more information which helps you answer the questions.

3. Complete Lesson 1, Steps 1 and 2.  
Answer questions on your own sheet of paper. You will need to draw age structure diagrams, there's really not enough room on the worksheet.

4. TURN IN BEFORE THE END OF THE PERIOD.

5. Complete "For Your Consideration" as homework. Your response should be at least 2 paragraphs long.

Tuesday, January 28, 2014

Population -- More practice problems. Age Structure Diagrams, and demography.


1/28/2014

Namibia is just about the only place on earth to have gotten conservation right for rhinos and, incidentally, a lot of other wildlife. Over the past 20 years, it has methodically repopulated one area after another as its rhino population has steadily increased. As a result, it is now home to 1,750 of the roughly 5,000 black rhinos surviving in the wild. (The worldwide population of Africa’s two rhino species, black and the more numerous white, plus three species in Asia, is about 28,000.) In neighboring South Africa, government officials stood by haplessly as poachers slaughtered almost a thousand rhinos last year alone. Namibia lost just two.




From NYTimes article: "A Trophy Hunt That’s Good for Rhinos", January 20, 2014.

Calculate the population growth rate, given 200 births, 120 deaths, 10 immigrants, and 5 emigrant Rhinos. What rate of growth is exhibited? What is the doubling time for this population.

Friday, January 24, 2014

Make up missing assignments

To make up missing assignments you can write a paper/create a graphic novel about:

What happens when human population exceeds the earth's carrying capacity?

12pt font
1 inch margins
double spaced

Each page of the paper will take the place of a missing work.

It can be fact-based fiction.
It must be original.
Sources will improve your grade.
You may include graphics. All graphics must include caption.
Graphic novels are acceptable.

email papers to: tmegahan@dallasisd.org

Thursday, January 23, 2014

Tuesday, January 21, 2014

Three Weeks Test Review

1/21/2014


ENVIRONMENTAL SYSTEMS

Use the information in the chart below to graph the data on the graph on the right. 

Independent variable on the horizontal (x) axis. Values should range from 1650 to 2020.
Dependent variable on the vertical (y) axis. Values should range from 0 to 20 billion.
Make sure that you have the correct labels for the X and Y axes and a title for your graph.


Work with your group to graph the human
 
 population statistics.




Year (A.D.)

Number of People (in (billions)

1650

0.5

1750

0.7

1850

1.0

1925

2.0

1950

2.5

1960

3.3

1970

3.6

1980

4.4

1990

5.5

2000

6.0

2010

6.4

 

 

 

 





 

1. It took 1649 years for the world population to double, going from 0.25 billion people to 0.50 billion people.   How long did it take for the population to double once again?                   yrs.

2. If the carrying capacity of the Earth is 9 million, in what year (according to your graph) will the carrying capacity be reached?                              

3. Explain what the graph will look like when the Earth reaches carrying capacity.







https://drive.google.com/file/d/0BwxQOAkh6K8gUnhRNnB1MFBWZEU/edit?usp=sharing

 

Friday, January 17, 2014

Make up

Word wall for definitions:
Essay prompt: 

WHICH REPRODUCTIVE STRATEGY PUT MORE STRESS ON THE ECOSYSTEM? R-strategy or K-strategy, and why? 



International Panel on Climate Change - Loss of Biodiversity

1/17/2014

On Wednesday, your class will host a discussion on Loss of Biodiversity. Six teams will complete a 3 minute presentation on the topic, and then the class will participate in open discussion.

Please visit the following website, read, and prepare your presentation.

I suggest you create a Prezi account, and give everyone in your group access so they can edit their portion. You can always change the password later.  

Check it out at: Prezi.com
http://ete.cet.edu/gcc/?/biodiversity_teacher_pages/
Here's the rubric for this activity:




 

 

 

 

 


One of the most important strengths of problem-based learning (PBL) is its capacity to teach science content. Often, the focus of project work in some classes seems to be more on teamwork, communication, or the finished “product,” such as a report or a display. But problem-based learning in science involves more than that. It involves using critical thinking and problem solving to draw conclusions based on investigations of the science content. While you may still assess students' teamwork and communication efforts to help them improve these skills, you will likely want to assess their science learning in more detail.

Assessment of student mastery of content through rubric construction is objective and efficient. Rubrics should be developed and tailored to meet the needs of the unique class. For example, no one rubric could meet the needs of assessing both a 9th grade integrated science class and a 12th grade environmental science class. Obviously, the students in the 9th grade class lack the research, critical thinking skills, and content knowledge expected of the seniors.

An example of a rubric to assess student content learning for the Biodiversity module is provided below. It lists several outcomes of student work for science research, analysis of data, and science content knowledge to help guide you in assessing students' level of mastery. Adding specific objectives for each of your classes will help in assessment and in letting your students know what is expected.

Science Research/Sources         (25)                                                                              

·         A variety of sources were used to locate relevant data on Earth’s biodiversity.

·         The research was complete enough to support student conclusions.

·         Conclusions are based on thorough research, not on limited information.

·         Varied and reliable resources were used.

·         Sources are provided.

Score   ________________

Analysis of Data                            (25)

·         Data were analyzed to identify trends occurring in biodiversity.

·         Presentation incorporates relevant tables and graphs to support conclusions.

·         Data are sufficient to support conclusions.

·         Student shows an understanding of the graphs and tables and can speak knowledgably about the analysis.

·         Student uses scientific data to support a position on biodiversity as an environmental issue.

·         Data used are well selected to support the position.

·         Data and supporting graphics extend beyond the basic.

    

Score   ________________

Science Content knowledge         (50)

·         Student explains the impacts of changes in global climate and understands these changes may be long reaching and slow to develop.

·         Variables in climate change are clearly recognized.

·         Student demonstrates an understanding of the background information on the causes of climate change, potential effects, and the concept of global carbon sinks and sources and their significance to Earth’s climates.

·         Student describes underlying environmental mechanisms that drive biodiversity on Earth.

·         Student identifies causes of increased global mean temperatures.

·         Student explains the importance of a rich biodiversity and possible consequences of biodiversity loss.

·         Student explains the impacts of environmental changes on biodiversity and why species may respond negatively to those changes.

·         Student describes both short- and long-term impacts of a loss of biodiversity to ecosystems and their inhabitants, including plants, animals, and humans.

                                                                                                                                Score   ________________

 

Monday, January 13, 2014

Calculating Exponential Growth

1/13/2014

Over the next couple of days we will be completing activities to teach you how to calculate exponential growth.

We will use the following
http://naturalsciences.sdsu.edu/ta/classes/lab2.7/TG.html


You will need to think back to previous labs...

Friday, January 10, 2014

Carrying Capacity and Human Population

1/10/2014

First a little test of your carrying capacity knowledge.

Quiz - make sure your work makes it to your folder!

overpopulation
source

Now, we will see how this applies to human populations! Complete this webquest activity. Answer the questions for TEXAS rather than California!!!!

We will talk about this on Monday! Be ready, and

HAVE A GREAT WEEKEND!!!


Thursday, January 9, 2014

Density Dependent/Density Independent Factors

1/9/2014



Happy Birthday To Me! Leave me comments to cheer up for being sick on my birthday :(

All work for this week belongs in your folder. Nothing else should be in there. The grade book is up, and I have already started posting grades!

Let's start with the quiz to show what you learned yesterday. Just write the answers.

http://www.bigwalnut.k12.oh.us/userfiles/82/Classes/23019/pop_eco[1].htm


Check your work.

Okay, I tricked you a little.

For 10 points extra credit:
1. Write down the numbers of the questions really related to yesterdays content :)
2. Write down the numbers of questions we've covered in the past.
3.  Write down the numbers of questions over topics we've not covered...but soon will ;)


Now, you will work together to complete an activity about limiting factors.

https://drive.google.com/file/d/0BwxQOAkh6K8gckpIZmh3cndFZGM/edit?usp=sharing

As you take turns reading, make sure you write down definitions for, and examples of:

Density Dependent Factors
Density Independent Factors

Questions are on pages 4 and 5. Work together to answer them all. The top grade for this assignment will be based on how many people complete all of the assignment!! Watch out for your classmates, and let's aim for 100%. I'll tell you which classes manage this. 

Be ready on Friday, our activity will require you to use all of the terms from this week. Start looking for people who have been getting it done.



Go to the Google maps link and click on the double arrows!
https://maps.google.com/maps?hl=en&ll=51.492159,-0.19092&spn=0.005291,0.013937&sll=51.492140,-0.193028&layer=c&cid=12502927659667388442&panoid=c9UMhWP_MWm9U0L48xEjYw&cbp=13,291.8,,0,18.86&gl=US&t=m&cbll=51.492132,-0.192862&z=17


Wednesday, January 8, 2014

Population Dynamics

1/8/2014
Every student who comments on this blog today will receive extra credit. Good luck!

Maybe, because it helped me today:
http://www.huffingtonpost.com/2014/01/07/lizzie-velasquez_n_4550829.html?ir=Good+News


This is an interactive lab on population ecology.
http://ats.doit.wisc.edu/biology/ec/pd/pd.htm

You will need a scientific calculator. The calculator on your computer can be set to scientific, if you click on "View".

On a sheet of paper:

1. Draw the graphs as you complete them.
2. Write down the answers for questions especially all calculation questions.
3. Anything you don't finish, is homework. We will go over the answers tomorrow!

Tutoring is  Tues & Thurs after school; Mon & Wed before.