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Human population

Transcript: Egg Foo Young Disease Economic Opportunity Disease Economic Opportunity These are just a few factors of population Technology Famine Famine Definition: Economic Opportunity How does it affect population? Famine Economic Opportunity Technology The application of scientific knowledge for practical purposes Technology affects population in a way that generally the higher technology, the less need for physical labour, therfore, less babys being born. Generally, the effect from economic opportunity is that the smaller family tends to have more money. This is because it's a smaller family to spread the wealth. A disorder of function not necessarily in result of physical injury -Effected by Many Factors Definition: Human Population How does it affect population How does it affect population Disease Disease is another factor in which population goes down. Disease will cause this because if the conditions are right, it will spread easily.One common cause for disease is low quality of life. The ability to make money A shortage of food for an amount of time Definition: Famine would be a factor in which population goes down. Many people die of starvation because they don't have the acess to enough food. One of the possible reasons for this would be a poor family and too expensive food Disease Definition: How does it affect population?

Human Population

Transcript: HUMAN POPULATION PG. 100-103 TERMS TO KNOW birthrates- the number of live birth per 1000 population in a given year. death rates- the number of death per 1000 population in a given year. demography- the study for human population size, density and distribution, movement and its birth and death rates. Limited factors - factors that affect in organisms ability to survive in its environment. Immigration is the movement of individuals into a population. Emigration is movement out of a population. what is the history of population growth for humans? in the 1800s the population remains fairly slow. in the 1930 world population has grown rapidly reachin six billion in 1999. in 2002, the human population was growing at a rate of more than 80 million people per year. This is also a formula Birthrate - Death rate = population growth rate (PGR) because Immigration & Emigration rates are not always accurate. If the PGR is above Zero more new individuals are entering the population then are leaving so the population is growing. A PGR can also less than zero, In 2002 the PGR for Europe was negative as fewer individuals are entering the population then are leaving. Doubling time is needed for a population to double in size. Age stucture refers to proportions of the population that are different age levels. A slow or negativegroth rate means that it will take a countrys population a long time to double size if ever. A rapid growth indicates that a countrys will double in a shorter time. A country that has a slow doubling time is sometimes catigorized as a developed country. there are a number of factors that determine population growth rate. These factors are birth, death, immigration and emigration rates. you can calculate a coutrys population growth rates with this formula: (birthrate +immigration rate) - (death rate + emigration rate ) = population growth rate (PGR)

Human Population

Transcript: Living standards (Land) The future Air: Combustion Lichens use as pollution indicator Lichens: Bushy Leafy Crusty Human population As the number increase, the effect will increase Total number of living humans in Earth. Water: waste being thrown in Resources Increasing population Coal, oil and natural gas Metal ores and other minerals High standards Household waste and sewage CO2 Human Population Effects Pollution the addition of something to the environment which can damage the living organisms.

Human Population

Transcript: y= 305,529,237(1+.011)^3 y= 418,575,054 Human Population Multiply. Human Population grows at a normal rate. Therefore scientist can create a exponential function to predict the increase. 1.) Plug in. y=305,529,237(1+.011)^3 Works Cited Raise 1.11 to the 3rd power. Real World example Human Population Growth By: Caroline Blum and Brenna Keenan In 2009, the population of humans was 305,529,237 people and the growth rate was 1.1%. After three years what would the population be? y= 305.529,237(1.11)^3 Period 3 Work 1. Decide whether the problem is growth or decay 2. Write down the equation for the problem which could either be axb^t or y=a(1+r)^t 3.Fill in the information that you know 4. Solve. It is used to predict the population in the future. Add 1 and .011 together. Procedures y=305,529,237(1.368) USNews. N.p., n.d. Web. 19 Nov. 2013. <http://www.usnews.com/opinion/articles/ 2008/12/31/us-population-2009-305-million-and-counting>. 2.) Solve.

Human Population

Transcript: The industrial revolution continued to dramaticaly increase the population, as did the improvment of technology and hygine The worlds maximum carrying capacity is unknown However new discoveries and inventions can increase this capacity. e.g. modern agriculture has allowed a faster rate of food production. Pessimists believe the world has already exceeded the carrying capasity and that we need to start to control the size of the population Optimists (e.g. united nations) believe that the world population will eventually become steady below the capacisty. Survival curves keep track of individuals born at about the same time (birth cohort) The curves show the percentage of individuals still living at a given age and is complied by plotting survival of a cohurt against age. Demography- study of the size and structure of populations. Demographic trends are shown in population pyramids Demographic transition: a change in the population 4. Low stationary stage Carrying Capacity The demographic transition model has four main stages The world population is continuing to increase exponential growth 2. Early expanding stage Population size and growth Human Population Less developed countries are undergoing a growth of human population, whish some believe is the same as what the more developed countries had previously gone through The develpoment of agriculture was the first factor which caused a huge increase in human population The population growth rate is the change in size of a paticular population per unit time. Surival Curve Calculating population growth rates Population growth rate= birth rate - death rate This change in the human population is called demographic transition 3. Late expanding stage Relative growth rates can be used to predict the doubling times of a population 1.High stationary Before the industrial revolution the population in Britain was low, but this increased rapidly after the revolution. Birth rate has now stabilised. Population pyramids

Human Population

Transcript: Unknown. "Carrying Capacity." Merriam-Webster. Merriam-Webster, n.d. Web. 05 Feb. 2014. "World Population - Carrying Capacity - Learn More - Our Changing Planet - UMAC." World Population - Carrying Capacity - Learn More - Our Changing Planet - UMAC. N.p., n.d. Web. 09 Feb. 2014. Layton, Julia. "Has Earth Reached Its Carrying Capacity?" HowStuffWorks. HowStuffWorks.com, 11 Dec. 2008. Web. 10 Feb. 2014. <http://science.howstuffworks.com/environmental/green-science/earth-carrying-capacity1.htm>. "Population." Our Future Planet. N.p., n.d. Web. 10 Feb. 2014. <http://www.ourfutureplanet.org/topic-population>. "Sustainability and the World Population: What Is Our Global Limit?" Living Green Magazine. N.p., n.d. Web. 10 Feb. 2014. <http://livinggreenmag.com/2013/07/11/people-solutions/sustainability-and-the-world-population-what-is-our-global-limit/>. “7 Billion: How Did We Get So Big So Fast?" YouTube. YouTube, 31 Oct. 2011. Web. 10 Feb. 2014. < Most people believe that the world can only hold about 10 billion people. Today’s food supply will only hold about 10 billion people. Even though some countries’ population is decreasing, the developed countries over-consume so much that they still end up gradually getting bigger. UK- 1.8 is average child per parents. America consumes way more than necessary. Human Population By Aarushi Singh Density-dependent limiting factor A limiting factor that depends on the population Competition Compete with each other for food, water, space, sunlight, etc. Fishes in a pond. Predation (predator- prey relationship) Best known population controller Killer whale- sea otter Parasitism and Disease Wasp cocoons kill caterpillars What will the carrying capacity of the world be? Carrying capacity- According to Merriam Webster, the maximum population that an area will support without undergoing deterioration. Different Factors 1 What will happen? What will the carrying capacity of the world be? Works Cited Today no one knows what’s going to happen. Will we go extinct Just continue to stay the same population. Or will technology just enable us to get even bigger! Density-independent limiting factor Affect all populations no matter what the population size is. Drought and other climate extremes Human disturbances Damming rivers, clear-cutting forests Different Factors 2 http://www.worldometers.info/world-population/

Human Population

Transcript: -Tractors aid farmers in plowing the vegatation which help farmers in their chores. -Fertilizers help keep the soil moist and enriched so the crops grow healthier. - Filters help purify water that is given to the plants clean and freshened water. As a group, we believe that no developed country should be required to help them in a way which they have to share their own resources, the reason being that even though one country may have an abundant amount of goods, it doesn't mean they won't run out. That's why no ecosystem is sustainable; b/c there are limiting factors and no product is never ending. Therefore the developed country will have to keep their resources, instead of sharing them, for future reference. Reduce Pollution Farming Practices Human Population & Carrying Capacity Should develop nations tell undeveloped nations how to control their population? We think they shouldn't because what one government thinks is right may not be what the other government thinks is right. Each government has the right to run its own country and no other government should meddle in between. If one government has a solution to help the government no one will know if it's divine or not. Control Population Should develop nations be required to help undeveloped nations to become more savvy in further develop their country ? - Nuclear energy is an alternative energy source. -It is environmental friendly; It emits no carbon dioxide into the atmosphere. -Wind and solar energy helps in many ways to get energy without polluting the air. -Birth control pills and abortion help control birth rate. -Transportation and communication has helped save many lives. - Medication and vaccines has helped prevent diseases and deaths.

Human Population

Transcript: geographic distribution density growth rate. Human Population Growth The human population cannot keep growing exponentially, because Earth & its resources are limited. Limiting Factors How Populations Grow Population Growth Human Population Growth Agriculture and industry made life easier and safer. Improved sanitation, medicine, and health care reduced the death rate and increased lifespans. At the same time, the birth rate remained high. This resulted in exponential population growth. Parasitism Predation A limiting factor is a factor that causes population growth to decrease. There are 2 types….. Limiting Factors How Populations Grow Exponential growth occurs when the individuals in a population reproduce at a constant rate. This type of population growth is characterized by a J -shaped curve. The size of the prey population determines the size of the predator population in an area. Population Growth Population density is the number of individuals per unit of area. This number can vary depending on the species and its ecosystem. Human Population Growth According to Thomas Malthus, war, famine, and disease would limit human population growth. Limits to Population Growth Population Growth The size of the human population tends to increase with time. About 500 years ago, the human population began growing more rapidly. This can be attributed to several factors… Predation The area inhabited by a population is known as its geographic distribution. There are 3 important characteristics of a population Populations can increase or decrease rapidly, depending on how many individuals are added to it or removed from it. Three factors that affect population sizes: Number of births Number of deaths Number of individuals entering or leaving the population. A limiting factor that depends on population size is called a density- dependent limiting factor. Emigration is the movement of individuals out of the population. Limiting Factors How Populations Grow Human Population Growth Population Carrying Capacity What types of factors? Age Structure Diagrams graph the numbers of people in different age groups in the population. Demographers can predict future growth using these models. These limiting factors only become limiting when the population density, or number of organisms per unit area, reaches a certain level. Four factors of this type are competition, predation, parasitism, and disease. Immigration is the movement of individuals into an area. Parasites also limit the population size. Parasites can range from microscopic bacteria to tapeworms that can measure 30 cm or more. Parasites take nutrients from their hosts, weakening them or causing disease or death. 5 species of birds in the same tree. What limiting factors would fish in this pond face? A population is a group of the same species living in the same area. Ex. Deer population Ex. Gray’s human population. Populations may also be controlled by predation, which involves a predator – prey relationship. Ex: Wolves and moose. When a population has abundant space and food, and is protected from predators and disease, the organisms will reproduce and the population size will increase. Population Ecology Population Growth The largest number of individuals that a given environment can support is called its carrying capacity Natural populations normally display logistic growth. Population Science Competition occurs when populations become crowded. Organisms compete with one another for food, water, space, sunlight and other essentials of life. Population Growth Human Population Growth How Populations Grow Density Independent….. Limiting Factors Density-Independent Factors affect all populations in similar ways, regardless of population size. These factors include human activities as well as severe natural conditions such as forest fires. Major upsets in the ecosystem can lead to long-term declines of certain populations. Competition may also occur between different species. This type of competition is a major force behind evolutionary change. Over time the species may evolve to be able to occupy separate niches. Populations Limiting Factors Population Science How Populations Grow Exponential growth of populations does not last very long. As resources become less available the growth of a population slows or stops. Logistic growth occurs after a period of exponential growth How are these organisms competing? A population will grow exponentially under ideal conditions with unlimited resources. The scientific study of human population is called demography. Demographers research birth rates death rates and age structure to help explain why some countries have higher growth rates than others. This type of population growth is characterized by an S-shaped curve. Examples of situations in which logistic growth is seen: When the birth rate and the death rate are the same. When the rate of immigration decreases and the rate of emigration increases.

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