Environmental Studies

Introduction to Environmental studies

Section #4

Variant #2

3. a) The Largest portion which represents sex group is a female group at the age range of 40-44.

b) Sex ratios: 10-14: 1.417/1.364=1.04 per woman

40-44: 2.481/2.508=0.98 man per woman

60-64: 1.801/1.933=0.93 man per woman

80+ : 0.710/1.141=0.62 man per woman

c) Population of woman is more than population of men

2. a) Population of Kazakhstan = 16,674,959

Population of Russia = 143,030,106

Territory of Kazakhstan = 2,724,900 sq. km

Territory of Russia = 16,995,800 sq. km

Density Kazakhstan = Population/Territory = 16,674,959/2,724,900 = 6.12 people per sq. km

Density Russia = 143,030,106/16,995,800 = 8.42 people per sq. km

8.42 > 6.12 Russia’s density is greater than Kazakhstan’s density

5. a) 1bln/7.5bln*1,000 = 133.3

133.3 – 1,000 x= (133.3*100)/1000 = 13.3%

x – 100

b) 1,021% per year. In another 14 years on which very likely 7 years is we consider growth model where population growth is geometrically increasing.

4. a) Min = 9.9mln; Max = 17mln.

b) 12mln in 1965; 16.6mln in 1990;

16.6mln/12mln = 1.383 => 38.3% increase in population

c) 14.5mln in 2003; 16.6mln in 2012;

16.6/14.5 = 1.145 => 14.5%

d) Over 9 years, population increased by 14.5%. Therefore, population will reach 17mln at the end of 2012 if various economic, social and political changes will not occur.

1) Population of Latvia for 2005 = 2,289,237

In = 1,120

En = 6,250

Birth = 20,704

Death = 31,376

∆P =?

CGR =?

AGR =?

∆P = Pt-P0 = (B-D)+(I-E) = (20,704-31,376)+(1,120-6,250) = -10,672+(-5,130) = -15,802

CGR = (∆P/mid-year pop-n)*1,000 = (-15,802/2,289,237)*1,000 = -0.0069*1000 = -6.9 for 1,000 people.

Pt = P0+∆P = 2,289,237-15,802 = 2,273,435

Pm-y = (2,289,237+2,273,435)/2 = 2,281,336

2,289,237 – 100%...