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Ecology
Vocabulary
53
Science
7th Grade
02/26/2012

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Cards

Term

Organism: 

Definition
living thing
Term
Habitat
Definition

An environment that provides the things a specific organism needs to live, grow, and reproduce.

Term

Biotic Factors:

Definition

 

The parts of a habitat that are living, or once living, and interact with an organism.

 

Term

 

Abiotic Factors:  

 

Definition
Nonliving parts of an organism’s habitat.
Term

Species: 

Definition
a group of organisms that can mate with each other and produce offspring that can also mate and reproduce.
Term

 

Populations:

 

Definition

All the members of one species living in a particular area

 

 

 

 

Term

 

Community: 

 

Definition
All the different populations that live together in an area.
Term

 

Ecosystem: 

 

Definition
A community of organism that liven in a particular area, along with their abiotic (non living) environment.
Term

 

 Ecology:  

 

Definition

The study of how organisms interact with each other and with their environment.

 

 

 

 

Term

Birth rate: 

Definition
the number of births in a specific population in a certain time period.
Term

Death rate: 

Definition
the number of deaths in a specific population in certain time period.
Term

 

Immigration: 

 

Definition
moving into a population
Term

 

Emigration: 

 

 

 

Definition
means leaving a population
Term

Population Density: 

Definition
The number of individuals in an area of a specific size
Term

Population Density Formula:

Definition

 

number of individuals

 

          Unit area

 

 

 

Term

Limiting Factors: 

Definition
an environmental factor that causes a population to stop growing or decrease in size: climate, space, food, and water
Term

Carrying Capacity: 

Definition
The largest population that an area can support
Term

Niche- 

Definition
The role of an organism in its habitat
Term

Competition- 

Definition
The struggle between organisms to survive as they attempt to use the same limited resources.
Term

Predation- 

Definition
An interaction in which one organism kills another food or nutrients.
Term

Predators-

Definition
The organism that does the killing
Term

 

Prey-

 

Definition
The organism that is killed
Term

Symbiosis-

Definition
when two different species live closely together and at least ONE of the species benefits.
Term

Mutualism-

Definition
A relationship in which both species benefit.
Term

 

Commensalism-

 

Definition
A relationship in which in which one species benefits and the other is neither helped or harmed.
Term

 

Parasitism-

 

 

 

Definition
A relationship that involves one organism living with, on, or inside another organism and HARMING it.
Term

Parasite-

Definition
The organism that benefits
Term

 

Host-

 

Definition
The organism that it LIVES ON
Term

Succession-

Definition
A series of predictable changes that occur in a community over time
Term

 

Primary Succession-

 

Definition
is the series of changes that occur in an area where no soil or organisms exist. Occurs when a new volcanic island forms.
Term

 

Pioneer Species- 

 

Definition
The first species to populate and area.
Term

Secondary Succession-

Definition
A series of change that occurs in an area where the ecosystem has been disturbed by forest fires, hurricanes, farming, and logging.
Term

 

Producer-

 

Definition
An organism that can make its own food.
Term

Consumer-

Definition
An organism that obtains energy by feeding on other organisms.
Term
herbivores-
Definition
consumers that eat only plants
Term

 

carnivores-

 

Definition
consumers that eat only animals
Term

 

omnivores-

 

Definition
consumers that eat both plants and animals.
Term

 

scavenger-  

 

Definition
a carnivore that fees on the bodies of dead organisms.
Term

Decomposers- 

Definition
Break down wastes and dead organism and return the raw materials to the ecosystem.
Term

 Food Chains-

Definition
a series of events in which one organism eat another and obtains energy.
Term

 

Food Web-

 

Definition
Consist of many overlapping food chains in an ecosystem.
Term

Energy Pyramids-

Definition
Shows the amount of energy that moves from one feeding level to another in a food web.
Term

 

 Natural resource: 

 

Definition
Anything that occurs naturally in the environment and is used by people.
Term

 

 Pollution: 

 

Definition
The contamination of Earth’s land, water, or air.
Term

 

 Point Source: 

 

Definition
Pollution can be linked to a specific source.
Term

 

 Nonpoint Source: 

 

Definition
Pollution that cannot be linked to any one source.
Term

 Environmental Science: 

Definition
the study of environmental issues and how humans can affect them.
Term
Renewable Resources-
Definition
resources which are always available or is naturally replaced in a relatively short period of time.
Term

Nonrenewable Resources: 

Definition
resources which are not replaced in a useful time frame.
Term

Fossil Fuels: 

Definition
three were formed many hundreds of millions of years ago before the time of the dinosaurs.
Term

 

Sustainable Use: 

 

Definition
using a resource in a way that maintains the resource at a certain quality for a certain period of time.
Term

Ecological Footprint: 

Definition
The amount of land and water that individuals use to meet their resource needs and absorb the wastes they produce.
Term

 

Conservation: 

 

Definition
The practice of managing the uses of resources wisely so that the resources last longer.
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