Enviromental Science Flashcards
Birthrate
The number of births in a population in a certain amount of time.
Estimate
An approximation of a number, based on reasonable assumptions.
Death rate
The number of deaths in a population in a certain amount of time.
Immigration
Moving into a population.
Emigration
Leaving a population.
Population density
The number of individuals in an area of a specific size.
Limiting factor
An environmental(
Carrying capacity
The largest population that area can support
Succession
Series of predictable changes that occur in the community overtime.
Primary succession
Series of changes that occur in the area where no soil or organisms exist.
Pioneer species
The first species to populate the area.
Secondary succession
The series of changes that occur in an area with the ecosystem has been disturbed but where soil and organisms exist.
Producer
In organism that can make its own food
Consumer
An organism that pertains energy by feeding on other organisms
Herbivores
Consumers that only eat plants
Carnivores
Consumers that eat only animals
Omnivores
Consumers that eat both plants and animals
Scavenger
Carnivores that eat the bodies of dead organisms
Decomposers
Organisms that break down Wastes and dead organisms
Food chains
A series of events in which one organism eats another and obtains energy
Food webs
A food web consists of many overlapping food chains in ecosystem
Energy pyramid
A diagram that shows the amount of energy that moves from one level to another
Water cycle
The continuous process by which water moves from the earth’s surface to the atmosphere and back.
Evaporation
The process by which molecules of liquid water stored energy and change to a gas
