Human Population Quiz

Human Population

• Human population is the number of people living in a specific area, from a village to the world.
• Currently, there are 7.8 billion people.
• Demographers predict 8 billion in 2023, 9 billion by 2037, and possibly 10 billion by 2056.

What is Population?

• A population is a group of individuals of the same species living in the same area or interbreeding and sharing genetic information.

Is this a Population?

• A picture of various animals in a natural habitat is not a population as it doesn't fit the definition. All the animals must be of the same species.

Population Projections to 2100

• The UN has projected various population scenarios up to 2100, showing a range of possible outcomes. These projections are important for resource management and planning.

Population Demography

• Crude birth rate: The number of live births per 1,000 people.
• Crude death rate: The number of deaths per 1,000 people.
• Rate of natural increase: The difference between the birth and death rates.

Population Dynamics

• Population dynamics is the general study of how populations change over time.
• A graph shows how factors like population size, quality, and production can change over time.

Demography

• Demography is the study of human populations.
• Demographic parameters include births, deaths, and migration.

Statistical Factors in Demographics

• Population size/abundance: The number of individuals.
• Density: The average number of individuals per unit area/volume.
• Age structure: The distribution of ages in a population..
• Fecundity (birth rates): The rate at which individuals produce offspring.
• Mortality (death rates): The rate at which individuals die.
• Sex ratio: The proportion of males and females in a population.

Population Distribution

• Patterns of population distribution: Clumped (organisms grouped together), Random (unpredictable distribution), and Uniform (organisms spread evenly).

Age Structure of the Philippine Population, 2018

• A population pyramid visually shows the distribution of age and sex in a country.

Number of Births and Deaths, World

• A graph depicting the number of births and deaths per year, showing trends in historical and projected values from 1950 to 2100.

Population by Marital/Relationship Status (in millions), 2000-2015

• Shows the population in millions across countries based on different relationship status (single, married, widowed, divorced/separated, common-law/live in, unknown) for 2000, 2007, 2010, and 2015.

Human Population

• Every second, about four or five children are born, and two people die.

History of Human Population Increase

• A timeline showcasing the growth of the human population dating back to the Old Stone Age.

World Population Growth and Doubling Times

• A table details the world's population growth over time and the corresponding doubling times.

Demographic Transition

• A three-stage pattern of change in birth rates and death rates during the industrial and economic development. It led to a decline in population growth.

Demographic Transition (Stages)

• Graph outlining the stages of demographic transition, illustrating the relationship of birth rates, mortality rates, and population size.

Longevity

• Longevity is the maximum possible age a species can live.
• Life expectancy is the average number of years a person can expect to live.

Top Ten Countries with High Life Expectancy

• Data on life expectancy (both sexes, and separately for men and women).

Human Population Growth

• The rise in human population increases the demand for resources: energy, food, water, and medical care. This growth has a significant impact on ecosystems and climate.

Limiting Factors Affecting Population Growth

• Short-term factors, such as food distribution disruptions from droughts or energy shortages.
• Intermediate-term factors, including the dispersal of pollutants, resource depletion, and a decline in firewood supply.
• Long-term factors, such as soil erosion, groundwater depletion, and climate change.

Carrying Capacity of Earth

• Carrying capacity is the maximum size of a population that an environment can sustain with adequate resources like food, water, shelter, and mates.

Effects of the Expansion of the Human Population on the Earth System

• Extraction of environmental resources increases as the population grows.
• Reliance on fossil fuels for electricity, industry, and transportation increases.
• Freshwater use rises for industrial, agricultural, recreational, and drinking water needs.

Types of Fossil Fuels

• Coal (a solid fossil fuel), petroleum (a liquid fossil fuel), and natural gas.

Effects of Human Population Expansion

• Urbanization impacts ecology.
• Overfishing and hunting impact species biodiversity.
• Spread of invasive species.
• Increase in the spread of illnesses.

Laws Affecting the Introduction of Species

• Plant Quarantine Service (PQS) and Philippine Fisheries Code. These laws regulate the introduction of new species to prevent harm and ensure environmental sustainability.

Impact of Population Growth on Disease Dynamics

• Air pollution, poor sanitation, and urbanization increase disease susceptibility.
• Global travel leads to increased risks of outbreaks.