Lesson 19 Definitions

Question 1

Malthusianism

Answer 1

the belief that human population if unchecked grows in an exponential manner, while food supply grew in a linear manner

Question 2

fertility rate

Answer 2

the amount of children every woman must have to keep the population stable

Question 3

migration rate

Answer 3

he difference between the number of immigrants and the number of emigrants

Question 4

theory of demographic transition

Answer 4

In demography, demographic transition is a phenomenon and theory which refers to the historical shift from high birth rates and high infant death rates in societies with minimal technology, education (especially of women) and economic development, to low birth rates and low death rates in societies with advanced technology, education and economic development, as well as the stages between these two scenarios.

Question 5

eutrophication

Answer 5

excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen

Question 6

anthropogenic

Answer 6

(chiefly of environmental pollution and pollutants) originating in human activity.

Question 7

gene therapy

Answer 7

an experimental technique that uses genes to treat or prevent disease. In the future, this technique may allow doctors to treat a disorder by inserting a gene into a patient’s cells instead of using drugs or surgery.