12/12/14

This weekend's homework is as follows:

11BD - See Thursday's post (complete Assignment 34B and read/take notes on "Population: 7 Billion" from the January 2011 issue of National Geographic).

If you would like extra credit, then try all of Assignment 35 by starting here... and have fun (ha).

12BD - Complete Assignment 35 and read and take notes on "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.

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?

If you were absent, then try all of Assignment 35 by starting here... and have fun (ha).

Assignment 35: “iPhone Island – Modeling Population 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.

Analysis

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

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?

6. Using the data below, create 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.)

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

7. How does the growth experienced on iPhone Island compare to that of human population on Earth?

8. How does this activity connect to our discussions of population biology this week?