The birthrate and Death Rate
Like the populations of many other living organisms,the size of the human population tends to increase with time.
historically, exponentially.
Change in a population over a given period of time refers to the increase or decrease in the number of individuals within that population. This change is influenced by factors such as birth rates, death rates, immigration, and emigration. Studying population changes can provide insights into trends, challenges, and opportunities for a given area or species.
Demography is focused on the statistical analysis of population information, this includes the examination of population dynamics such as population size, structure and distribution which illustrate the structural change in population.Population Studies is about studying the number of people in a given area, their characteristics and the changes over time. It seeks explanation for the patterns of variations and the causes of change. It also projects future population size and its consequences.
groth rate
Population size refers to the total number of individuals in a specific area, while population density is the number of individuals per unit area. Population size gives the total count of individuals, while population density provides a measure of how crowded or sparse the population is in a given area.
Population growth refers to an increase in the size of a population over time due to natural births, while population change encompasses all factors that contribute to alterations in the population size, including births, deaths, immigration, and emigration. Population growth specifically focuses on the numerical increase, whereas population change considers both increases and decreases and can be either positive or negative.
Population change over time occurs due to a combination of factors such as births, deaths, migration, and natural disasters. These factors influence the growth or decline of a population, resulting in shifts in demographics and population size. Understanding patterns of population change is important for policymakers to plan for future resource allocation and infrastructure development.
cycles in population size over time; repeating changes in population size over time
In a population without limits, there will be an increase in the population size. For that we will use the equation (dN/dt) = 1.0 N where N is the number of individuals in the population and (dN/dt) is the rate of change in the number of the population over time.
Demographic data include on one hand population staticsuch as population size, population spatial distribution, and population composition such as age, sex, ethnicity, and other decomposed socioeconomic components such as types of residence, marital status, educational status, health status, employment status, occupation, industry, etc. and population dynamicson another such as births, deaths, migration, marriage, divorce, income etc..Population static represents population numbers at a given time in a given area, which is meaningful at a point of time, rather than a duration of time; population dynamics represents numbers of an event such as births, deaths, and migration within a period of time, rather than a point of time. Static indices, or point indices, are not additive, while the dynamic indices, or period indices, are additive.
The ways in which a given population's numbers grow and shrink over time, as controlled by birth, death, and emigrationThe changes in populations through time are known as population dynamics.