12/17/13

Tonight's homework is to read 4.3 "Age Structure" from p. 67 through 69 and 4.5 "Longevity and Its Population Effect on Population Growth" on p. 71 through 73 in Botkin and Keller. You can take notes but we will be discussing the material in class tomorrow but there may be some questions about the reading as part of your Do Now (which would be collected).

12/16/13

Tonight's homework is to complete Assignment 28 Part 1 and read and take notes "Population: 7 Billion" from the January 2011 issue of National Geographic. Be sure to check out some of the links to pictures as well. If the above link doesn't work then try this or this. If you didn't complete any aspect of the weekend's homework previously, then it is strongly recommended that you do so.

Think about:
- What concerns are associated with humankind's rapid population growth?
- Is our growth occurring equally everywhere on Earth?
- What, if anything, is being done to deal with population growth?

Analysis

Part I: Unrestricted Exponential Growth of the iPhone Island Population

Use your data table to plot a graph demonstrating the unrestricted exponential growth of the population over time. Be sure to give your graph an appropriate title and follow the practices associated with good graphing.

“iPhone Island – Modeling Exponential Growth” Analysis and Thinking Questions

Answer all of the following questions to best of your ability in complete sentences. Use examples, details, and vocabulary to help support your answers.

Part I: Unrestricted Exponential Growth of the iPhone Island Population

1. What is the ratio of births to deaths in this model population?

2. How many “years” did it take you to reach a population of 100?

3. What inferences and/or connections can you make based on the graph of iPhone Island’s population growth?

4. Using this experiment, define exponential (or geometric) growth.

5. In what way do exponential (or geometric) growth rates differ from arithmetic (linear)

growth rates?

Sample Data for Assignment 28 Part 1

Unit 3 Ecology Exam MC Keys

12/13/13

This weekend's homework is to complete Part II of Assignment 28 and read "A Closer Look" and "Working It Out" for 4.1 and 4.2 (p. 64, 66, 68) and add to your reading notes about populations.

Part II: World Population Trends

1650 = 0.5 billion	1940 = 2.3 billion	1980 = 4.4 billion	2000 = 6.1 billion
1750 = 0.7 billion	1950 = 2.5 billion	1985 = 4.8 billion	2003 = 6.3 billion
1850 = 1.1 billion	1960 = 3.0 billion	1990 = 5.3 billion	2008 = 6.7 billion
1900 = 1.6 billion	1970 = 3.6 billion	1995 = 5.5 billion	2013 = 7.1 billion
1930 = 2.1 billion

Using the above information, plot a graph of world population versus time from 1650 to 2013 in

the space below. Use your graph to predict world population for the year 2020 and 2030. (Hint: Use

dotted lines to extend your graph into the future.)

“iPhone Island – Modeling Exponential Growth” Analysis and Thinking Questions

Answer all of the following questions to best of your ability in complete sentences. Use examples, details, and vocabulary to help support your answers.

Part II: Doubling Time of a Population

6. Calculate the growth rate for the U.S. Show your work.

· As of 2012, the population of the U.S. was approximately 313,900,000. The increase in

the U.S. population is approximately 2,200,000 a year, from immigration and new births.

· Growth rate = amount of change in a population/total population x 100.

7. Calculate the doubling rate for the population of the U.S. Show your work.

· To determine doubling time, divide 70 by the population’s growth rate.

8. What inferences and/or connections can you make based on the graph of the United States’ population growth?

9. How did this activity connect to our discussions of population biology this week?

12/12/13

Tonight's homework is as follows:

For both 12A and 12CD: Read "Population: 7 Billion" from the January 2011 issue of National Geographic. Be sure to check out some of the links to pictures as well. If the above link doesn't work then try this or this.

12A: Take notes on what you read and then complete the remaining questions for Assignment 27B. Some extra credit is available to those who determine the 95% confidence interval for their data and the sample data.

Think about:
- What concerns are associated with humankind's rapid population growth?
- Is our growth occurring equally everywhere on Earth?
- What, if anything, is being done to deal with population growth?

12CD: Read the article and complete Assignment 27B. Remember that your answer to #5 will be collected and scored.

Assignment 27B "Capturing School of the Future” Analysis and Reflection

Answer all of the following questions to the best of your ability. Use details, vocabulary, and examples whenever possible.

1. List potential sources of error that could have affected your estimation of the population.

2. What difficulties did you encounter with this experiment? What additional difficulties might be present in a field study?

3. Was your estimate close to the actual population size? If no, how could the accuracy of the activity be increased?

4. Why would a scientist want to be able to estimate population size of different organisms?

5. TO BE COLLECTED AND SCORED…Discuss one or two of the most meaningful errors and the specific impacts it/they may have had on the data and/or how you interpreted it. What changes did/would you make and why? Discuss each change made or potential change and predict how it would specifically change the data.

12/11/13

There is no formal homework tonight. Just make sure that you have access to your group's collected data for class tomorrow.

12/10/13

Tonight's homework is to complete Assignment 26. See below.

“Too Many To Count!” Comprehension and Discussion Questions

Answer all of the following questions to the best of your ability. Use details, vocabulary, and examples whenever possible.

1. What are the advantages and disadvantages of using the quadrat method to measure populations and their growth?

2a. Why might results from Figure 2 not accurately represent the actual populations?

2b. How could this be fixed?

3. Thoroughly analyze the data you collected. This means that you:

- Make a graph. (Which graph or graphs would be the most useful?)

- Draw inferences/conclusions.

- Try to explain what happened to produce the data and connect the activity/data to content from class.

4. What would you expect this area to look like in 1 year’s time? Support your answer. Use vocabulary and details.