Podcast
Questions and Answers
Around 60,000 years ago, the human population was generally stable at around 600,000 ______.
Around 60,000 years ago, the human population was generally stable at around 600,000 ______.
individuals
The human population remained fairly constant until agriculture and livestock breeding gave rise to steady, long-term population ______, about 10,000 years ago.
The human population remained fairly constant until agriculture and livestock breeding gave rise to steady, long-term population ______, about 10,000 years ago.
growth
Unprecedented population growth has occurred since the 1700s, with the human population reaching 1 billion by the early ______.
Unprecedented population growth has occurred since the 1700s, with the human population reaching 1 billion by the early ______.
1800s
Population growth is determined by calculating the number of individuals who are born, die, or move into or out of an ______.
Population growth is determined by calculating the number of individuals who are born, die, or move into or out of an ______.
The number of deaths per 1,000 individuals for a certain time period is called the ______ rate.
The number of deaths per 1,000 individuals for a certain time period is called the ______ rate.
In early human history, birth rates and death rates were fairly ______, which resulted in little change in the size of the human population.
In early human history, birth rates and death rates were fairly ______, which resulted in little change in the size of the human population.
Human population grew rapidly after the Industrial Revolution because the ______ rate began to decline.
Human population grew rapidly after the Industrial Revolution because the ______ rate began to decline.
The rate of change in population is called ______ growth - a growth pattern in which individuals in a population reproduce at a constant rate.
The rate of change in population is called ______ growth - a growth pattern in which individuals in a population reproduce at a constant rate.
Populations are limited by ______ and resources, which will eventually cause exponential growth to cease.
Populations are limited by ______ and resources, which will eventually cause exponential growth to cease.
Using resources reduces their amounts, which is a problem for ______ resources like fossil fuels.
Using resources reduces their amounts, which is a problem for ______ resources like fossil fuels.
Using resources creates waste which, if left ______, can harm the environment.
Using resources creates waste which, if left ______, can harm the environment.
The contamination of Earth's land, water, or air is called ______.
The contamination of Earth's land, water, or air is called ______.
When the number of humans grows beyond what the available resources can support, we reach the point of ______.
When the number of humans grows beyond what the available resources can support, we reach the point of ______.
Human overpopulation is a driving force of many environmental and social issues, including climate change, habitat loss, and human ______.
Human overpopulation is a driving force of many environmental and social issues, including climate change, habitat loss, and human ______.
The practice of using less of a resource so that it can last longer is called ______.
The practice of using less of a resource so that it can last longer is called ______.
Sustainable use of living resources gives resources time to ______ and replenish themselves.
Sustainable use of living resources gives resources time to ______ and replenish themselves.
Addressing human impacts on the environment also requires ______ new solutions to our problems.
Addressing human impacts on the environment also requires ______ new solutions to our problems.
Humans use a variety of resources to produce electricity, from burning ______ fuels to building dams.
Humans use a variety of resources to produce electricity, from burning ______ fuels to building dams.
Currently, more than 700 million people do not have access to safe, clean ______.
Currently, more than 700 million people do not have access to safe, clean ______.
Experts estimate that by 2025, nearly 1.8 billion people could be suffering from water ______.
Experts estimate that by 2025, nearly 1.8 billion people could be suffering from water ______.
Flashcards
Birth Rate
Birth Rate
The number of births per 1,000 individuals in a population during a specific time period.
Death Rate
Death Rate
The number of deaths per 1,000 individuals in a population during a specific time period.
Exponential Growth
Exponential Growth
A growth pattern where a population increases at a constant rate, resulting in faster growth as the population gets larger, limited by space and resources.
Pollution
Pollution
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Overpopulation
Overpopulation
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Conservation
Conservation
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Sustainable Use
Sustainable Use
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Population Change Factors
Population Change Factors
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Non-renewable Resources
Non-renewable Resources
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Environmental Conservation
Environmental Conservation
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Study Notes
- There are more humans living on Earth today than at any other time in history.
- Past human populations fluctuated due to environmental or climate conditions
- The human population was generally stable at around 600,000 individuals 60,000 years ago.
- A warming climate and improvements in hunting and fishing techniques resulted in a rapid increase to about 6 million humans.
- Agriculture and livestock breeding lead to steady, long-term population growth around 10,000 years ago.
- Unprecedented population growth has occurred since the 1700s, with the human population reaching 1 billion by the early 1800s.
- As of 2017, the Earth's population was 7.5 billion.
- Population growth is determined by births, deaths, and movement of individuals into or out of an area.
- Birth rate refers to the number of births per 1,000 individuals in a specific time period.
- Death rate refers to the number of deaths per 1,000 individuals in a specific time period.
- A population decreases if rates of deaths and emigration are greater than rates of births and immigration, and increases if the opposite is true.
- There were an estimated 280 births and 109 deaths every minute in 2016.
- Birth and death rates were fairly balanced in early human history, resulting in little change in population size.
- The death rate began to decline after the Industrial Revolution around 1750, leading to rapid population growth.
- Advances in technology led to increased availability of resources like food and clean water.
- Improvements in public health and general living standards also lowered the death rate.
- Human population increases more rapidly over time
- Exponential growth is a growth pattern in which the larger a population gets, the faster it grows.
- Populations are limited by space and resources, meaning extreme exponential growth cannot last for very long.
- Exponential growth will cease when a population reaches the upper limit of organisms its environment can support.
- Populations have experienced periods of growth and decline, based on available conditions and resources.
- Earth provides resources such as energy sources, minerals, water, trees, and plants.
- These resources are needed by all organisms.
- Some resources such as water affect our planet's climate and natural cycles.
- Industries and families rely on fossil fuels for electricity.
- Fuel is used for heating, cooling, transportation, and food production.
- Wood and minerals are used for construction.
- Fresh, clean water is essential for survival.
- As the world's population grows, so does the demand for resources.
- Many resources are not evenly distributed around Earth.
- More than 700 million people do not have access to safe, clean water.
- Nearly 1.8 billion people could be suffering from water scarcity by 2025, according to estimates.
- Using resources reduces their amounts, especially nonrenewable resources.
- Obtaining resources involves drilling, mining, or clearing Earth's surface, causing damage.
- Removing resources increases the potential to release harmful substances into the environment.
- Using resources creates waste, which can harm the environment if left untreated.
- Motorized vehicles release gases and chemicals that can cause pollution.
- Human activities affect other life on Earth: mining or diverting water can destroy habitats.
- Pollution endangers organisms in land and water habitats.
- The point of overpopulation is reached when humans grow beyond what the available resources can support.
- Human overpopulation drives environmental and social issues like climate change, habitat loss, and human conflict.
- Earth is approaching a point where it cannot adequately meet human needs at the current rate of resource use.
- Science can identify problems and offer solutions, but individuals, governments, and organizations must decide how to manage the impacts of growth.
- Economic, social, and environmental costs and benefits must be weighed against one another.
- There are benefits and costs to each method of resource use.
- Conservation is the practice of using less of a resource so that it can last longer.
- Sustainable use of living resources means using resources in ways that maintain them at a certain quality for a certain period of time.
- Addressing human impacts requires engineering new solutions to problems.
- New solutions might include desalination to counter water shortages, or renewable energy.
- The need for new ideas and solutions will increase as human populations continue to rise.
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