Human Population Growth

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Population Noun

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[pop-yuh-ley-shuhn]

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Population

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All the members of a single species that are living together in a specific geographical area at the same time.

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Example: The graph shows how a population grows rapidly at first and then levels off at the carrying capacity.

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Birthrate Noun

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[burth-reyt]

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Birthrate

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The measure of the number of live births occurring within a population over a specific period of time.

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Example: A world map uses colors to show birth rates per 1,000 people in different countries.

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Death rate Noun

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[deth reyt]

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Death rate

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The measure of the number of deaths occurring within a population over a specific period of time.

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Example: A graph showing how education level affects odds of death, not directly explaining death rate.

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Immigration Noun

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[im-i-grey-shuhn]

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Immigration

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The process of individuals moving into a new population's area from a different geographical location to live there.

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Example: A bar graph showing the percentage of migrant children in schools across different countries.

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Emigration Noun

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[em-i-grey-shuhn]

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Emigration

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The process of individuals permanently moving out of a population's area to settle in another location.

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Example: Deer move through a mountain pass from one population to another, showing emigration.

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Population Growth Rate (PGR) Noun

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[pop-yuh-ley-shuhn grohth reyt]

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Population Growth Rate (PGR)

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The rate at which the number of individuals in a population increases or decreases during a specific time period.

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Example: The graph shows how human population increased over time, highlighting key events that influenced growth.

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Population Explosion Noun

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[pop-yuh-ley-shuhn ik-sploh-zhuhn]

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Population Explosion

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A sudden and very rapid increase in the number of individuals in a population, often over a short time.

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Example: The graph shows how human population rapidly increased after major events like the Industrial Revolution.

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Demographer Noun

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[dih-mog-ruh-fer]

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Demographer

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A scientist who studies the statistical characteristics of human populations, such as size, density, distribution, and vital statistics.

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Example: This population pyramid shows the age and gender distribution of a human population, which demographers study to understand population growth.

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Age structure Noun

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[eyj struhk-cher]

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Age structure

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The distribution of a population's members across various age groups, which helps predict future population growth trends.

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Example: This chart shows how different age groups are distributed in a population, helping predict future growth.

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Natural resource Noun

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[nach-er-uhl ree-sawrs]

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Natural resource

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Any material or substance occurring in nature that is useful or necessary for the survival of living things.

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Example: The image shows Earth as a water source being tapped, illustrating natural resources.