ENVS 202 Second Homework Assignment

Date Due: May 8
Turn in the Assignment to your Discussion Section Leader.
For this homework assignment, you may work with 2 or 3 other students in class to complete it.

OPTIONAL

If you want to prepare a web page in response to this assignment that would be great. This is not required however.

Questions:

2. In the year 2000, the world's population was about 6 billion people. If the world's population continues to grow at the rate of 1.25% per year, what will the world population be in the year 3000? What will the population be if the growth rate is 0.8% per year.

3. The Following Table shows the population of Oregon Counties from The period of 1950 to 1995. You have just been giving a job as resource manager for the state of Oregon and you need to examine the population base as a function of county within the state. This is your first day on the job and your boss gives you a bunch of data to distill to answer the following questions:

a) What would the projected population of Lane County be in the year 2020?
b) What is the fastest growing county (in terms of percentage not raw population) in Oregon since 1960?
c) Where are the regions of fastest and slowest growth in Oregon. To help you, here is the county map of Oregon:
d) Compare the growth rates from 1970 to 1980 with those from 1980 to 1990 for Lane and Douglas counties. What do you see and do you have an explanation for this result? That is, was the growth rate the same between decades, higher, lower or what. Finally, how does the Lane country growth rather between 2000 and 1990 compare to that between 1990 and 1980?
e) Using the exponential growth tool determine the average growth rates from 1950-2000 for the following counties: Deschutes, Jackson, Lane Lincoln, Marion and Multnomah.

THE DATA

County 2000 1990 1980 1970 1960 1950 Baker 16729 15317 16134 14919 17295 16175 Benton 78130 70811 68211 53776 39165 31570 Clackamas 339472 278850 241919 166088 113038 86716 Clatsop 35579 33301 32489 28473 27380 30776 Columbia 43685 37557 35646 28790 22379 22967 Coos 62660 60273 64047 56515 54955 42265 Crook 19354 14111 13091 9985 9430 8991 Curry 21101 19327 16992 13006 13983 6048 Deschutes 116580 74958 62142 30442 23100 21812 Douglas 100494 94649 93748 71743 68458 54549 Gilliam 1913 1717 2057 2342 3069 2817 Grant 7893 7853 8210 6996 7726 8329 Harney 7611 7060 8314 7215 6744 6113 Hood River 20473 16903 15835 13187 13395 12749 Jackson 181886 146389 132456 94533 73962 58510 Jefferson 19104 13676 11599 8548 7130 5536 Josephine 75907 62649 58855 35746 29917 26452 Klamath 63909 57702 59117 50021 47475 42150 Lake 7401 7186 7532 6343 7158 6649 Lane 323271 282912 275226 213358 162890 125776 Lincoln 44303 38889 35264 25755 24635 21308 Linn 103029 91227 89495 71914 58867 54317 Malheur 31541 26038 26896 23169 22764 23223 Marion 285461 228483 204692 151309 120888 101401 Morrow 11070 7625 7519 4465 4871 4783 Multnomah 660767 583887 562640 556667 522813 471537 Polk 62623 49541 45203 35349 26523 26317 Sherman 1921 1918 2172 2139 2446 2271 Tillamook 24218 21570 21164 17930 18955 18606 Umatilla 70689 59249 58861 44923 44352 41703 Union 24546 23598 23921 19377 18180 17962 Wallowa 7222 6911 7273 6247 7102 7264 Wasco 23826 21683 21732 20133 20205 15552 Washington 448120 311554 245808 157920 92237 61269 Wheeler 1543 1396 1513 1849 2722 3313 Yamhill 85262 65551 55332 40213 32478 33484

4. Below is the data that corresponds to the population by region in the United States:

b) show what the difference in your estimates would be if you assume the population is growing (or declining) linearly instead of exponentially.

The Data:

Population Distribution by Region Expressed as a Percantage of Total US Population

stratifier	1970	1975	1980	1985	1990	1991	1992	1993	1994	1995	1996	1997	1998
Northeast	24.25	22.93	21.69	20.96	20.40	20.21	20.03	19.88	19.72	19.57	19.42	19.27	19.14
Midwest	27.97	26.87	25.98	24.72	23.96	23.88	23.80	23.73	23.65	23.58	23.50	23.39	23.27
South	31.05	32.29	33.27	34.22	34.37	34.47	34.55	34.66	34.80	34.94	35.06	35.19	35.31
West	17.22	17.91	19.06	20.10	21.27	21.44	21.62	21.73	21.83	21.92	22.02	22.16	22.29

c) Now use this data to estimate what the total US population will be in the year 2025 and what the US population growth rate is:

Year Pop. (in millions)

1981 230.5

1982 232.6

1983 234.7

1984 236.8

1985 238.9

1986 241.1

1987 243.2

1988 245.5

1989 248.0

1990 250.5

1991 253.4

1992 256.4

1993 258.9

1994 261.4

1995 263.9

1996 266.3

1997 268.9

1998 271.4

1999 272.2

2000 274.6

2001 276.9

2002 279.2

5. In 1950 the population of India was 357 million and in China it was 555 million.

In 2000 the population of India was 1 billion and in China it was 1.28 billion.

Calculate the respective growth rates for India and China and then determine in what year in the future, based on those growth rates, will the population in India overtake that in China. Course Page

ENVS 202 Second Homework Assignment

Date Due: May 8 Turn in the Assignment to your Discussion Section Leader. For this homework assignment, you may work with 2 or 3 other students in class to complete it.

OPTIONAL

Date Due: May 8
Turn in the Assignment to your Discussion Section Leader.
For this homework assignment, you may work with 2 or 3 other students in class to complete it.