Population Growth and Scientific Reasoning

Vocabulary flashcards covering human population growth stages, age structures, environmental impact formulas, and scientific reasoning methods.

5 Key Properties of Population

Abundance, birthrates, death rates, growth rates, and age structure.

Peak Human Population Growth Rate

A growth rate of 2.1% that peaked between 1965-1970 due to rapid improvements in healthcare and food production.

Stage 1 of Human Population Growth

The early period of hunter and gatherers where the total population was less than a few million.

Stage 2 of Human Population Growth

The period marked by the rise of agriculture, which allowed for an increase in population density and human population.

Stage 3 of Human Population Growth

The period during the Industrial Revolution where improvements in health and food security led to a rapid increase in population.

Stage 4 of Human Population Growth

The current stage of human population growth that allows for an increase in population density and human population.

Saltaire (U.K.)

An industrial town built in 1851 by Sir Titus Salt containing the largest industrial building in the world, houses instead of slums in Bradford, washhouses/bathhouses, a hospital, library, concert hall, and gymnasium, which increased worker height, life expectancy, and money.

Logistic Growth Curve

An S-shaped curve of growth where population growth increases exponentially only temporarily up to the inflection point.

Total Fertility Rate

The average number of children born to a woman, which is the single most important statistic in population growth and is strongly influenced by women's educational opportunities.

Age Structure

A measurement expressing how a population is divided among age groups, ignoring environmental characteristics like food, water, and shelter, while implying current and future social, economic, and environmental conditions.

Pyramid Age Structure

An age structure pattern representing a population with many young individuals, a high death rate, and a short average lifetime.

Inverted Pyramid Age Structure

An age structure pattern representing a population with a large elderly population and small youth population, indicating declining growth.

Column Age Structure

An age structure pattern where birthrate and death rate are low, leading to little change in population size.

Column with Bulge Age Structure

An age structure pattern where an event in the past caused a high birth or death rate for a specific age group.

$$T = P \times I$$

An equation where $T$ represents the total impact of the human population on the environment, $P$ represents population size, and $I$ represents average environmental impact per person.

Disprovability

The criterion that a statement can be deemed scientific if someone can state a method by which it could be disproven.

Nonscientific Statement

A statement considered nonscientific because no one can think of a test to falsify it.

Observations

Empirical data gathered by any of the 5 senses or by instruments that measure beyond what humans can sense.

Inference

A generalization that arises from a set of observations.

Fact

An observation about a particular thing that is agreed upon by all.

DRY MIX

A graphing acronym indicating that the Dependent Responding variable is placed on the Y-axis and the Manipulated Independent variable is placed on the X-axis.

Deductive Reasoning

Scientific reasoning that involves reasoning from initial definitions and assumptions, which is not always true.

Inductive Reasoning

Scientific reasoning based on generalizations from a number of observations, where proof is stated in terms of probability of occurrence.