16. Population Growth

Question 1

How many individuals born/die per second.

Answer 1

4 born, 2 die.

Question 2

Net gain per second

Answer 2

2.3

Question 3

Net gain per year

Answer 3

72 million

Question 4

Exponential Growth

Answer 4

=deltaN/deltat
=rN
r=birth rate - death rate
N=number of individuals reproduced

Question 5

Logistic Growth

Answer 5

rN((K-N)/K
K=carrying capacity
N>K then G is positive
Most common

Question 6

2 things limiting population growth

Answer 6

Density independent factors and density dependent factors

Question 7

What are density independent factors

Answer 7

Climate like natural disasters, hurricanes etc.

Question 8

What are density dependent factors

Answer 8

A factor having negative feedback on growth rate like food resources.

Question 9

Total Fertility Rate (TFR)

Answer 9

number of individuals born on average during a woman’s reproductive life

Question 10

Replacement Level of TFR

Answer 10

2.06, the population is stationary

Question 11

Doubling Time

Answer 11

0.7/r

The time it takes for a population to double in size

Question 12

What countries have the highest fertility rate

Answer 12

Developing countries

Question 13

How many individuals are predicted in 2050 in the world

Answer 13

9 billion

Question 14

Where is growth expected to be greatest in?

Answer 14

Developing countries

Question 15

What are the two demographic worlds?

Answer 15

Developing countries and developed countries

Question 16

Factors determining fertility rate

Answer 16

Cultural
Demographic
Economic
Political

Question 17

Demographic Transition Model

Answer 17

All societies go through progression.
Expect decline in birth and death rates.
Stages: 1. Pre-industrial 2. Transition 3 industrial 4. Post-industrial

Question 18

Perspectives on human population growth

Answer 18

Optimistic Economist
Pessimist
Technologist
Social Justice
Ecologist

Question 19

Optimistic Economist

Answer 19

World population will stabilize due to demographic transitions

Question 20

Pessimist

Answer 20

Demographic transitions may not occur in developing countries

Question 21

Technologist

Answer 21

Technology will save us

Question 22

Social Justice

Answer 22

Population growth is the symptom not the problem

Question 23

Ecologist

Answer 23

Population growth is the problem. We’ll go over the carrying capacity if everyone goes through demographic transition the way developed countries did.

Question 24

Age structure in the USA

Answer 24

Pig in the python
Pig=baby boom
8 million born
Fertility rates dropped 3-2
Medicaid and Medicare increased 7x in the next 4 decades.

Question 25

When was the great leap forward?

Answer 25

1958-1961

Question 26

What happened in the Great leap forward?

Answer 26

31 million died

Question 27

China’s 1 child rule

Answer 27

1979

Limited population by 1.2 billion was the goal

Question 28

What happening in 2013 in China?

Answer 28

1 Child policy rule was relaxed

Question 29

Age structure in China

Answer 29

4-2-1 rule

1.2 M for 1 F

Question 30

How to ensure the high trajectory period isn’t the path taken?

Answer 30

Decrease the number of children people have

Question 31

Trends in TFR

Answer 31

1. Female Education
2. Family Planning
3. Contraception Use

Question 32

What happened in Bangladesh?

Answer 32

TFR declined from 4.6 to 3.3 in 25 years.