Vocabulary
What is the definition of a community?
A group of species living in the same place.
What is the definition of demographics?
Demographics is the study of population growth.
What does TFR stand for?
Total fertility Rate
Define biocontrol.
Biocontrol is the use of biological organisms to control pests.
What is a food web.
A food web is the natural interconnection of food chains.
What is mutualism?
Mutualism is when both organisms benefit from the relationship.
What are the three main types of growth?
The three main types of growth are linear, logistic, and exponential.
Why do developing countries have a higher TFR than developed countries?Explain
The reason is because of the economical difference. So in developing countries health care does not exist and the family needs money so the have kids so they can work.
List some greenhouse gasses.
CO2, methane, water vapor.
What are autotrophs?
Autotrophs are producers.
What is a niche?
The role that a species plays in an ecosystem.
What type of growth do populations not do?
Linear growth
List some ways the we could lower the birth rate.
Health care, laws, education in women, family planning, pensions, child labor laws.
What are invasive species and how can they cause problems?
An invasive species are alien or non-native species introduced accidentally or intentionally and they can cause problems if a predator is not present.
What is the definition of a heterotrph and give one example.
A heterotrph is any organism that has to get its food from a different place than the sun. An example of a heterotrph are humans.
Define and give examples of a biome.
A biome is an area of the planet that can be classified according to the plants and animals that live in it. Ex. Tundra, deciduous forest, grasslands, deserts, topical forest.
What is carry capacity?
The max amount of organisms that an environment can support indefinitely.
What is rapid growth in a population?
When there is a lot more people have kids than there are people dying.
What causes eutrophication?
To much nitrogen and phosphorus from fertilizers that runoff into water.
What do the arrows in a food web represent?
The represent the passing of energy through preys and predators.
What is parasitism and list two examples.
Parasitism is where only one organism benefits from the relationship. One example is humans and tapeworms. And another example is a dog and a flea or tick.
Define and give an example of density dependent and density independent.
Density dependent are things that will slow or limit the population growth because there are too many individuals. Examples of density dependent limiting factors are diseases and the amount of food. Density independent are things that slow or limit population growth regardless of size.
What is an affect of an aging population.
Don't have enough people to replace the dying people which means that the economy will go down because so many people are retiring.
What causes the thinning of the ozone layer?
It is caused by aerosol chemicals called chlorofluorocarbons(CFCs).
What is the rule of 10?
The rule of 10 is when only 10% of energy is passed because some is lost to heat and some is used by the organism.