The number of births in a population in a certain amount of time.
What is birth rate?
100
Producers, Consumers, and Decomposers.
What are the energy roles organisms can fill in an ecosystem?
100
The behavior or physical characteristic that allows an organism to live successfully in it's environment.
What is an adaptation?
100
The processes of evaporation, condensation, and precipitation.
What are the processes that make up the water cycle?
200
Living and nonliving parts of a habitat
What are biotic and abiotic factors?
200
The number of deaths in a population in a certain amount of time.
What is death rate?
200
Diagrams that show the transfer of energy from organism to organism in an ecosystem,.
What are food chains and food webs?
200
The struggle between organisms to survive as they attempt to use the sam elimited resource.
What is competition?
200
When nitrogen moves from the air to the soil, into living things and back into the air.
What is the nitrogen cycle?
300
Members of one species in an area
What are populations?
300
Moving into and leaving a population
What is immigration and emigration?
300
Shows the amount of energy that moves from one feeding level to another in a food web.
What is an energy pyramid?
300
An interaction in which one organism kills another for food.
What is predation?
300
The process of changing free nitrogen into a usable form of nitrogen.
What is nitrogen fixation?
400
The different populations that live together in an area make this up.
What is a community?
400
An environmental factor that causes a population to stop growing.
What is a limiting factor.
400
Herbivores, Carnivores, Omnivores, and Scavengers.
What are the different types of consumers?
400
A close relationship between two species that benefits at least one of the species.
What is symbiosis?
400
The first species to populate an area.
What is a pioneeer species?
500
A community of organisms in a particular area.
What is an ecosystem?
500
The largest population an area can support.
What is the carrying capacity?
500
10% of the chemical at one level of the food web.
What is the percent of energy that is transferred to the next higher level?
500
Mutualism, Commensalism, and Parasitism.
What are the three types of Symbiosis?
500
The series of changes that occur in an area where no soil or organisms exist and the series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist.